MX93011A - Macronix International

MX93011A

APPLICATION NOTE [K1 VERSION]

1.0 GENERAL DESCRIPTIONS

l MX93011A is an engine chip for digital answering machine (DAM).

l It provides functional modules, including speech compression/decompression, silence management,

telephone line signal processing, internal-ROM voice prompt, ARAM management, etc.

l By using this chip, users do not need external microprocessors and can effectively reduce the overall system

cost.

2.0 FEATURES

l High-quality (12.8kbps) speech compression/decompression algorithm for message recording/playback.

Recording time can be about 21.7 minutes in one 16M bits DRAM.

l Low (4.8kbps) compression rate with silence management technique for voice prompt making.

l Support total 127 messages, maximum 7 OGMs and maximum 8 personal mailboxes.

l Support internal/external voice prompt. On-chip maskable ROM space for voice prompt can store data of

about 50 seconds.

l DTMF generation and detection with near-end echo cancellation.

l DAM BIOS modes provide speech, timer and telephone signal service.

l Control code can be masked in, external µP is not required.

l Provide single low crystal solution (FLL).

Provide standard sample program for customer development.

Ver. 1.01 July 28, 1998

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

3.0 BLOCK DIAGRAM

3.1 FIRMWARE FUNCTIONAL BLOCK DIAGRAM

CALL DAM_BIOS

Control of :

- Keypad

- LED

- Security

- Telephone

- Timer

- Power

ARAM management

(message data)

Timer maintenance

Speech processing

Line signal processing

(remote control)

System Control CodeDAM BIOS and Algorithm

CONF

RESP

Program Code

Display

8.8.8.8

Key PadMX93011A

BIOS and Control

Codec

DAA

ARAM

Speaker

Microphone

Telephone Line

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

4.0 PIN CONFIGURATIONS

100

LD\

CE\

LDA\

CE\

LEN\

OPT10

OPT9

OPT8

OPT7

OPT4

OPT3

OPT6

OPT5

OPT2

OPT1

OPT0

X32I

X32O

XF\

IPT5

IPT4

IPT7

IPT6

IPT3

IPT2

IPT1

IPT0

VDD

GND

BIO5

BIO4

BIO7

BIO6

BIO3

BIO2

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

5.0 PIN DESCRIPTIONS

POWER/CLOCK/CONTROL PINS :

SYMBOLPIN TYPE PIN NUMBER DESCRIPTION

VDD 23, 43, 69, 84 5V power source

GND 24, 44, 53, 70, 85 Ground

X1/VDD 88 32.256MHz crystal input/Connect to VDD in single low X‘tal

mode

X2/GND 89 32.256MHz crystal output/Connect to GND in single low X‘tal

mode

RST\ IS96 Power-on reset

XF\ OA14 External flag if UPMODX=1. This pin can be directly written

by one DSP instruction. Default inactive (5V output)

HOLD\ IS67 Hold DSP clock down and release bus

HOLDA\ OA/Z66 Ack to HOLD\ signal

EROMIS97 Disable internal ROM, use external ROM only

NMI\ IS41 Non-maskable interrupt pin

INT1\ IS40 Interrupt pin

X32O13 32.768KHz crystal output

X32I12 32.768KHz crystal input

FLLEN\ IS54 1 : Dual X‘tal mode

0 : Single low X‘tal mode

MEMORY INTERFACE PINS :

SYMBOLPIN TYPE PIN NUMBER DESCRIPTION

EAD0-EAD15 OA/Z61-55, 52-45, 42 DSP RAM/ROM external address bus. EAD0-EAD14 are also

for DRAM address.

ED0-ED15 IT/OA/ZR68, 71-83, 86-87 DSP RAM/ROM/DRAM external data bus. With soft latch

feed back current is 250 µA

EDCE\ OA/Z65 External data chip enable

EPCE\ OA/Z64 External program chip enable

ERD\ OA/Z63 SRAM/ROM external read

EWR\ OA/Z62 SRAM/ROM external write

CAS\ OA90 DRAM column address select

RAS\ OA93 DRAM row address select

DRD\ OA91 DRAM read

DWR\ OA92 DRAM write

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

CODEC INTERFACE PINS :

SYMBOLPIN TYPE PIN NUMBER DESCRIPTION

CFSOA35 Codec frame sync, 8KHz (9.6KHz). Output low in power down

mode.

CMCKOA36 Codec master clock, 1.536MHz. Output low in power down

CDX0OA34 Codec data transmit

CDR0IS38 Codec data receive

OPT : Output port

SYMBOLPIN TYPE PIN NUMBER DESCRIPTION

OPT0-OPT15 OB11-1, 100-98, 95,

94 Output to pin, all output values are registered and may be

read back when read by ‘IN’ instruction.

OPT16-OA33, 37, 39 Output to pin, when UPMODX=1

NOTE UPMODX : µP mode select bit in CTLR register, “0” is its power on reset value.

BIO : Bi-direction port

SYMBOLPIN TYPE PIN NUMBER DESCRIPTION

BIO0-BIO7IT/OA32-25 Input/output port when UPMODX=1. Direction is controlled by

BIO8-BIO15 (see BIOR).

IPT : Input port

SYMBOLPIN TYPE PIN NUMBER DESCRIPTION

IPT4-IPT7IS18-15 Input port

IPT0-IPT3ISH22-19 Input port with internal pull high resistor (R=30KΩ)

NOTE :

IT TTL level input

ISCMOS level schmidt trigger input (hysteresis : 2V∼3V)

ISHCMOS level schmidt trigger input with internal pull high resistor (∼30KΩ)

OA8mA drive level output

OB16mA drive level output

Zhigh impedance state

ZRhigh impedance state with soft latch

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

PIN TYPE SUMMARY :

INPUT :CMOS level schmidt trigger input :

IPT7∼IPT4, CDR0, INT1\, NMI\, FLLEN\, HOLD\, RST\, EROM

CMOS level schmidt trigger input with internal pull high resistor :

IPT3∼IPT0

OUTPUT :8mA drive level output :

XF\, CDX0, CFS, CMCK, RAS\, CAS\, DRD\, DWR\, OPT18∼OPT16

8mA drive level output/high impedance state :

EAD15∼EAD0, HOLDA\, EPCE\, EDCE\, ERD\, EWR\

16mA drive level output :

OPT15∼OPT0

BI-DIRECTION :

CMOS level schmidt trigger input/8mA output :

BIO7∼BIO0

TTL level input/8mA output/high impedance state with soft latch :

ED15∼ED0

MULTIPLEX PINS :

PIN NUMBERPIN NAMEFLLEN\=1 (Dual x‘tal)PIN NAMEFLLEN\=0 (Single x‘tal)

88 X1 32.256MHz crystal inputVDD Power VDD

89 X2 32.256MHz crystal output GND Power ground

NOTE: FLLEN\ : pin 54

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

6.0 FUNCTIONAL DESCRIPTIONS

DAM BIOS

The MX93011A-K1 DAM BIOS provides DSP embedded functional modules, including speech compression and

decompression, telephone line signal processing, ROM voice prompt, ARAM management and time keeping.

DAM BIOS service is requested via a DAM_BIOS call with CONF (16 bits) parameter, and answered in RESP (16

bits) word.

DAM BIOS supports 13 modes of service and responds useful information about timing, ARAM utilization,

detected DTMF, etc. (see DAM BIOS format)

ARAM MANAGEMENT

The MX93011A-K1 BIOS uses ARAM as the storage device for message data. ARAM types supported by the

MX93011A-K1 BIOS are as follows :

1. 64K x 16

2. 128K x 8, 128K x 16

3. 256K x 4, 256K x 8, 256K x 16

4. 512K x 2, 512K x 4, 512K x 8, 512K x 16

5. 1M x 1, 1M x 2, 1M x 4, 1M x 8, 1M x 16

6. 2M x 1, 2M x 2, 2M x 4, 2M x 8, 2M x 16

7. 4M x 1, 4M x 2, 4M x 4, 4M x 8, 4M x 16

8. 8M x 1, 8M x 2, 8M x 4, 8M x 8, 8M x 16

ARAM specifications are :

1. ARAM access time is less than 120 ns.

2. ARAM refresh uses CAS-BEFORE-RAS mode.

3. ARAM is separated to 16384 clusters, clusters with failed bits will be regarded as bad clusters.

4. DC/AC characteristics are the same as those of standard DRAM.

5. Maximum input/output leakage current is 2 µA.

6. Maximum stand-by current is 2 mA.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

CONTROL CODE AND VOICE PROMPT CONFIGURATION

There are three configurations for customer development or production.

Configuration 1 :

In this configuration, the BIOS+ALGORITHM and control codes are all running in the external high-speed

EPROMs or SRAMs. MX93011A pin 97 (EROM) must set to high.

This configuration is mainly used in the development stage and the access time of high-speed EPROMs or SRAMs

must be less than 30 ns.

14K words

18K words

0000H

3800H

7FFFH

External high-speed EPROMs or SRAMs

BIOS+ALGORITHM code

(address 0000H - 37FFH)

control code and internal voice prompt

(address 3800H - 7FFFH)

0000H

8000H

FFFFH

External low-speed EPROMs

external voice prompt

data address 0800H - FFFFH

external voice prompt

program address 8000H - FFFFH

0800H

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

Configuration 2 :

In this configuration, the BIOS+ALGORITHM code is running in the MX93011A internal ROM and the control code

running in the external low-speed EPROMs. The MX93011A pin 97 (EROM) must be set to low.

This configuration can be used in the development stage or for production. The control code must start with two

words 1234H and 5678H.

14K words

0000H

3800H

7FFFH

DSP internal ROM

BIOS+ALGORITHM code

(address 0000H - 37FFH)

External low-speed EPROMs

0000H

E000H

FFFFH

external voice prompt

data address 0800H - FFFFH

external voice prompt

program address 8000H - DFFFH

0800H

max. 8K words

8000H

control code

(address E000H - FFFFH)

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

Configuration 3 :

In this configuration, the BIOS+ALGORITHM and control codes are all running in the MX93011A internal ROM.

The MX93011A pin 97 (EROM) must be set to low.

This configuration is used for production.

To set the voice prompt configuration, see DAM BIOS Mode 7.

14K words

18K words

0000H

3800H

7FFFH

DSP internal ROM

BIOS+ALGORITHM code

(address 0000H - 37FFH)

control code and internal voice prompt

(address 3800H - 7FFFH)

0000H

8000H

FFFFH

External low-speed EPROMs

external voice prompt

data address 0800H - FFFFH

external voice prompt

program address 8000H - FFFFH

0800H

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

MESSAGE RECORDING AND STORAGE

The MX93011A-K1 BIOS provides a high quality speech compression technique to permit over 20 minutes of

speech storage in each 16M bit of DRAM device.

The BIOS supports up to 127 variable length incoming and outgoing messages that are labeled as Msg ID 1 to 127.

Although ICM could range from Msg 1 to 127, Msg IDs 127 to 121 are the only places for outgoing messages

(OGM) storage so that the deletion and recovery of old OGM are easier to maintain. The Msg IDs of incoming

messages are labeled chronologically and rearranged automatically after recording or deleting. ICM with Msg ID 1

is the oldest recorded incoming message.

During recording, the MX93011A-K1 BIOS also monitors the telephone line signal to detect the presence of DTMF,

Call Progress Tone and Continuous Tone and responses to the control program. The control program can stop

recording, and delete the last n*400ms/200ms from the memory using a Record command with assigned Tail Cut

factor.

The MX93011A-K1 BIOS can generate a desired tone during recording voice message, which allows the

application such as two-way recording. During recording, Record Pause function is provided.

The recording voice signal, received through the CODEC input, is transmitted back to the CODEC output by the

MX93011A-K1 BIOS.

OUTGOING MESSAGE (OGM) RECORD

The MX93011A-K1 BIOS provides flexible recording ways for outgoing message. The control program can select

to delete the old OGM before a new one is recorded or to abort the new OGM record without losing the old OGM.

NEW/OLD MESSAGE

For the control program to manipulate incoming messages more handily, the MX93011A-K1 BIOS keeps an

internal record of the ICM to identify the new/old status of messages.

Before playback, the status of ICM is considered as “new”. All incoming messages that have been played could

change their status to “old” by issuing Real Del bit on Delete command. After Real Del is issued, all new/old ICM

Msg IDs will be rearranged. The functions, Play New or Delete All Old messages, are provided by the

MX93011A-K1 BIOS in the command set.

MESSAGE PLAYBACK

Random access for playback of any new message or message with specified Msg ID is supported by the

MX93011A-K1 BIOS. During playback, the MX93011A-K1 BIOS also monitors the telephone line signals, and Play

Pause function is provided. The MX93011A-K1 BIOS is able to fast-forward the playback of a recorded message,

and the playing speed will be up to 33 %.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

MESSAGE DELETION

The MX93011A-K1 BIOS provides two ways to delete recorded ICMs. One is the two-step method - the

combination of Del Mark and Real Del on Play and Delete command, and the other is the immediate method -

Delete command. The two-step method enables the control program to handle the deletion more flexibly, while the

immediate method deletes a specified message directly.

VOICE PROMPT

For high-quality voice prompt playback, the MX93011A-K1 BIOS utilizes the built-in speech decoder and an

internal ROM or/and external EPROM/ROM to store the vocabulary. The storage size of internal voice prompt is

about 13K words (minimum 44 seconds). The BIOS also supports up to a 62K-word external EPROM/ROM that

allows minimum 3.44 minutes of voice prompt storage. The combination of internal (lower part) and external

(upper part) voice prompt is allowed. The vocabulary supports up to 255 phrases. Given a phrase number in the

Voice Prompt command from the control program, the MX93011A-K1 BIOS outputs the corresponding utterances

to the Codec interface. The starting address of external voice prompt data could be located at data address 0800H,

or program address 8000H.

During playback of the voice prompt, the MX93011A-K1 BIOS monitors the telephone line signals.

TIME KEEPING

There is a timer clock in the MX93011A. The control program can issue Set Time and Get Time commands to get

time services. The clock also supports system to stamp time to the recorded incoming message.

PERSONAL MAIL

The MX93011A-K1 BIOS supports up to 8 mailboxes that may be used for personal mail application. Each mailbox

has its own ICM/MEMO Msg ID. Before recording, playing or deleting messages, the control program should set

the corresponding mailbox number first with Personal Mail command.

ENHANCED ARAM TEST

To overcome the ARAM data loss problem, the MX93011A-K1 BIOS provides a mechanism that allows the control

program to perform enhanced ARAM testing at its idle state. By using this mechanism, the un-used ARAM bits will

obtain the additional testing and thus more ARAM data loss bits can be detected and avoided to store data onto

them. In general, from our experimental data, it is suggested that the control program performs enhanced ARAM

testing every 30 ∼ 60 seconds and stops this testing after total 5000 times.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

DTMF DETECTION

For remote control operation of the answering machine, the MX93011A-K1 BIOS monitors the incoming telephone

line signal to detect the presence of DTMF signal.

TONE GENERATION

Up to double tones can be generated by the MX93011A-K1 BIOS. The levels and frequencies are programmable

by the control program.

CALL PROGRESS TONE DETECTION

The MX93011A-K1 BIOS supports the detection of call progress tone within the band of 300 - 640 Hz for the

incoming telephone line signal. The tone detector is implemented with a bandpass filter. Indication of the presence

of call progress tone is responded to the control program, and could be used to terminate recording.

NEAR END ECHO CANCELLATION

The MX93011A-K1 BIOS implements a near end echo canceller in software to enhance the detection of DTMF and

Call Progress Tone during Playback and Voice Prompt mode.

VOX DETECTION (DIGITAL VOICE ACTIVATED RECORDING)

The speech detection is implemented in the DAM BIOS to indicate whether the recording signal level is above the

Vox threshold. If the control program sets the Vox Record bit on Initial command, the recording of the speech

would start when the voice activity is detected. The control program has to set Vox threshold by issuing command

mode 12. Hexadecimal numbers for Vox threshold are listed in Table 6.

QUERY AND REPORT

The MX93011A-K1 BIOS is capable of reporting to the control program about the query of the current status, such

as the number of recorded messages, the number of new messages, the number of old messages, the available

recording time of ARAM, the time of recorded message, and the ARAM good/bad check.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

POWER DOWN

With the power of backup batteries, the MX93011A is capable of keeping messages and data stored in the ARAM

during power failure. In power down mode, the MX93011A will run at a lower clock rate to reduce power

consumption and keep refreshing the ARAM.

CRYSTAL CONNECTION

The MX93011A allows two ways of crystal connections :

1. Dual-crystal solution : use both high crystal (32.256 MHz) and low crystal (32768 Hz). To enable this mode, the

FLLEN\ (54) pin must be connected to VDD. In this mode, the MX93011A high clock is generated from the high

crystal directly and the low crystal is mainly used in power down mode.

2. Single-crystal (FLL, Frequency-Locked-Loop) solution : use only low crystal (32768 Hz). To enable this mode,

the FLLEN\ (54) pin and X2 (89) pin must be connected to ground and the X1 (88) pin to VDD. In this mode, the

low crystal is to generate all the MX93011A system clocks and the high crystal can be saved to reduce the

overall system cost.

7.0 OPERATIONAL DESCRIPTIONS

INITIAL PROCEDURE

When the system is powered up, the RST\ pulse will make the MX93011A to run programs from address 0. After

doing check sum of internal ROM codes and setting some initial values, control will be transferred to the customer

program.

INTERNAL RAM

The MX93011A has internal RAM 2048 words. But only address 0 to 127 (in data page 0, total 128 locations) are

allocated for customer program usage. Other locations are reserved for the DAM BIOS and algorithm programs.

ROM

The MX93011A can support ROM space up to 64K words and there are 32K words in the internal ROM. The first

14K words of internal ROM are used by the DAM BIOS and algorithm programs. The other 18K words are reserved

for the customer program and voice prompt.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

INTERRUPT

The MX93011A supports interrupts such as NMI, Single Step, Interrupt 1, Codec Interrupt, System Timer Interrupt

and Trap Vector. All interrupts have entry points in the customer program and end up with RET instructions. In

general cases, only System Timer Interrupt and Interrupt 1 require the customer maintenance.

POWER LOW

There are two solutions to save power consumption when power low happens :

Software hold mode :

The control program can enter Software Hold Mode by setting bit 10 of CTLR register (I/O register 7) to 1. When

enabling Software Hold Mode, the MX93011A will halt until it is awaked by an interrupt.

Power down mode :

In this mode, the high crystal (32.256 MHz, if existed) will be disabled and the low crystal (32768 Hz) is used as the

chip clock source. The control program can enter Power Down Mode by setting bit 11 of CTLR register to 1. At the

same time, bit 3 of CTLR register must also be cleared to use the low crystal as the system timer source. When

enabling Power Down Mode, the system timer tick will be 1/32 second. To leave Power Down Mode, the steps are,

1. Clear bit 11 of CTLR register to 0, then

2. Wait until bit 5 of CTLR register changes to 0. (the high clock re-oscillates completely)

3. Finally, if using dual-crystal solution, set bit 3 of CTLR register to 1 to use the high crystal as the system timer

source.

8.0 MODES OF OPERATION

The MX93011A-K1 BIOS supports 13 modes of operation, that are listed as follows :

2Play

3Message Status

4DTMF Generator

5 Line Monitor

6Delete Message

7Set Current Time/Voice Prompt/Silence

8Get Current Time

9Initial and Test Memory

10 Get Record Message Information

11 Voice Prompt

12 Voice Activity

13 Personal Mail

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

RECORD

When Record command is received from the control program, the MX93011A-K1 BIOS performs speech

compression, stores the message into ARAM, and monitors telephone line. If the Vox Record bit had been set to 1

on Initial and Test Memory command, recording of the speech will start upon the voice activity detected, else the

MX93011A-K1 BIOS starts recording immediately after Record command is received.

Clearing Marked Record (bit 8-10) to 0, if it is recording ICM. When recording OGM, the control program should set

Marked Record (bit 8-10) to desired number other than 0 as OGM ID.

Setting bit 5 (Annc Del) to 1 on Initial and Test Memory command, the control program can choose to delete the old

OGM before a new one is recorded. If that bit is cleared to 0, the new OGM recording can be aborted without losing

the old OGM by issuing Mark Fail (bit 11) on Record command.

During recording, the control program can pause the recording by setting Pause (bit 7) to 1 and resume recording

by clearing that bit. Line monitoring will continue during pause.

The control program can stop recording by setting Stop (bit 6) to 1, and delete the last n*400ms/200ms from the

memory by using a Record command with assigned Tail Cut factor (bit 0-5).

While system memory is full, MX93011A-K1 BIOS will stop message recording, show the status in response word

(bit 7, Mfull).

During Record mode, the control program can instruct the MX93011A-K1 BIOS to generate a tone by issuing the

DTMF Generator command. Setting Stop bit on DTMF Generator command will stop tone generating.

The MX93011A-K1 BIOS will terminate Record mode when Stop bit on Record command is set to 1.

Note : The MX93011A-K1 BIOS supports up to 127 incoming and outgoing messages recording which are labeled

as Msg ID 1-127. The Msg IDs of incoming message are labeled chronologically and rearranged automatically

after recording. Although ICM could range from Msg ID 1 to 127, Msg IDs 127 to 121 are the only places for

outgoing message storage. So, it is strongly suggested that the control program should keep an upper bound of the

number of ICM. (For example, upper bound of ICM = 127 - maximum OGM number that will be applied in user‘s

specification.)

PLAY

When Play command is received from the control program, the MX93011A-K1 BIOS performs message playback

and line monitoring. The Msg ID (bit 0-6) is set by the control program to specify which message to play. To

playback new message (non-played one), set Play New (bit 10) to 1, then the MX93011A-K1 BIOS will search to

play the non-played message with specified Msg ID. During playing, the control program can pause playback by

setting Pause (bit 8) to 1 and resume playing from the same point by clearing that bit. Line monitoring will continue

during pause. To fast playback a recorded message, set Fast Play (bit 11) to 1 and the playing speed will be up to

33%.

To delete and stop the playing message, the control program can set Del Mark (bit 7) on Play command. After

being tagged a “Del Mark”, the marked message is not really deleted until a Real Del (Delete Message mode bit 8)

is set. The Real Del command not only deletes the messages that have been tagged a “Del Mark” but also changes

the status of those ICMs that have been played to old. The ICMs that have not been played before are regarded as

“new”. After Real Del is issued, all new/old ICM Msg IDs will be rearranged.

For the control program, it is used to issue the Real Del after the user terminates the manner of playback.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

The response word contains the information of tones detected from the line, playing time spent (bit 8-15) and End

of play flag (bit 6), which indicates the end of the current message. When the Play End bit is 1, the MX93011A-K1

BIOS stops playback.

The MX93011A-K1 BIOS will terminate Play mode when Stop bit or Del Mark bit is set to 1 on Play command.

MESSAGE STATUS

In this mode, there are 6 request codes for the control program to get message information :

1. Get the number of personal recorded messages (request code=0)

2. Get the number of personal new messages (request code=1)

3. Get the number of personal old messages (request code=2)

4. Get the available recording time with unit of second (request code=3)

5. Get the DAM BIOS version (request code=4)

6. Get the number of total recorded messages (request code=8)

The result will be reported in the response word.

DTMF GENERATOR

In this mode, up to double tones can be generated by the MX93011A-K1 BIOS. The tone levels and frequencies

are programmable and controlled by the control program. The DTMF Generator command defines the output gains

in bit 0-3 for the 1st tone, and bit 4-7 for the 2nd tone. Each tone can be programmed from 3 dB (gain code 0000)

to -25 dB (gain code 1110) with 2 dB resolution. The frequencies are defined in the variables BUF1 and BUF2 with

the following relationship :

frequency code = desired frequency (Hz) * 8.192

f(n) = 32767 * cos (2*pi*f_code*n/(8000*8.192))

where f_code is the input frequency code, n is sequence index and 8000 is the sampling rate

For single tone, Codec outputs the signal s(n) :

s(n) = gain * f(n)

For dual tone, Codec outputs the signal s(n) :

s(n) = 0.5 * (gain1*f1(n) + gain2*f2(n))

To generate a single tone, the gain code of the other tone should be set to 1111. MX93011A-K1 BIOS starts tone

generation only after receiving the start command.

The MX93011A-K1 BIOS will terminate DTMF Generator when Stop bit is set to 1 on DTMF Generator command.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

LINE MONITOR

In this mode the MX93011A-K1 BIOS monitors the telephone line signal for the detection of DTMF, Call Progress

Tone, Vox, and/or Continuous Tone. The MX93011A-K1 BIOS keeps monitoring the line until Stop bit is set to 1.

The MX93011A-K1 BIOS returns to the control program a response word that reflects the flag of Call Progress

Tone, Vox, Continuous Tone and the index of DTMF signal that has been detected :

0001 1

0010 2

0011 3

0100 4

0101 5

0110 6

0111 7

1000 8

1001 9

1010 *

1011 0

1100 #

The MX93011A-K1 BIOS will terminate Line Monitor mode when Stop bit is set to 1 on Line Monitor command.

DELETE MESSAGE

This mode provides an immediate way to delete or un-delete messages as follows :

1. To delete a specified message, set its Msg ID in bit 0-6 and clear bit 11, 10 and 7 to zero.

2. To delete a specified new ICM, set Del New Msg (bit 10) to 1, give the New Msg ID in bit 0-6, clear bit 11, 7 to

zero.

3. To delete all old ICM, set Del All Old (bit 7) to 1 and clear bit 11, 10 to zero. (Bit 0-6 is ignored)

4. To erase the “Del Mark” from a specified ICM (“Del Mark” is a tag set on Play command for deletion), set Del

Mark Clr (bit 11) to 1, give the Msg ID in bit 0-6 and clear bit 7 to zero.

SET CURRENT TIME/VOICE PROMPT/SILENCE THRESHOLD

In this mode the control program can set the current time to the timer clock of the MX93011A. The time information

includes second, minute, hour and week. The timer in the MX93011A will be used to stamp time and data to the

recorded message.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

1. To set second, put the data in bit 0-7 and use request code (bit 8-11) 0000.

2. To set minute, put the data in bit 0-7 and use request code (bit 8-11) 0001.

3. To set hour, put the data in bit 0-7 and use request code (bit 8-11) 0010.

4. To set week, put the data in bit 0-7 and use request Codec (bit 8-11) 0011.

5. To set voice prompt configuration, put the selection data in bit 0-1 and use request code (bit 8-11) 0110.

6. To set silence threshold level, put the data in bit 0-3 and use request code (bit 8-11) 0111.

GET CURRENT TIME

In this mode the control program can get the current time from the timer clock of the MX93011A. The time

information includes second, minute, hour and week.

1. To get second, use request code (bit 8-11) 0000.

2. To get minute, use request code (bit 8-11) 0001.

3. To get hour, use request code (bit 8-11) 0010.

4. To get week, use request code (bit 8-11) 0011.

The requested data will be reported in the response word.

INITIAL AND TEST MEMORY

In this mode there are 9 functions for the control program to define :

1. ARAM Initialization

The control program can initialize the ARAM by setting Init ARAM (bit 0) to 1. At the same time, the initialization

procedure can be set to normal (around 89 sec. for 1Mx16 ARAM) or fast (around 17 sec. for 1Mx16 ARAM) by

setting Fast ARAM Test (bit 2) to 0 or 1. This function is normally used after first power-up of the system. The

control program must send this command to the MX93011A-K1 BIOS in order to format ARAM. The MX93011A-

K1 BIOS performs ARAM formatting to determine the ARAM size (address space and bit width) and detect the

good/bad memory unit of ARAM. The response word reported to the control program contains the information of

ARAM bit size (bit 0-3), ARAM address size (bit 4-7), ARAM good/bad status (bit 8) and ARAM good rate (bit 9-15).

If the examination in the initialization shows that the ARAM quality meets the pre-defined specification, the

MX93011A-K1 BIOS responses 1 in ARAM good/bad status bit. After initialization, all messages in the ARAM are

lost.

2. ARAM Good/Bad Check

The MX93011A-K1 BIOS allows the control program to check the status of ARAM by setting the ARAM Check (bit

1) on this command. By checking the sum of ARAM management table, the MX93011A-K1 BIOS can identify the

current ARAM status to be good or bad.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

3. Line On/Off

The control program should set Line On/Off (bit 3) to 1 if the system is logged in from telephone line, and clear that

bit to 0 if in local keypad operation. Failing to set this bit properly will degrade the performance of echo

cancellation.

4. Vox On/Off Record

If the control program turns on the Vox Record function (by setting bit 4 to 1) on this command, speech recording

will start upon the voice activity detected, else recording will start immediately after Record command is issued.

5. OGM Deletion

By setting bit 5 (Annc Del) to 1 on this command, the control program can choose to delete the old OGM before

recording a new one. If that bit is cleared to 0, the old OGM is not deleted until the new OGM recording is

completed. With this option, the new OGM recording can be aborted without losing the old OGM by issuing Mark

Fail (bit 11) on Record command.

6. New/Old Select

By setting New/Old Select (bit 6), the control program can decide which condition a new message will be changed

to an old one. There are two options. When this bit is set to 1, the new message that has been played (even not

played end) is regarded as an old message. If this bit is cleared to 0, the new message that has been played end is

regarded as an old one.

7. Tail Cut Unit

By setting Tail Cut Unit (bit 7) to 1, the control program can choose the tail cut unit length to be 200 ms. If this bit is

cleared to 0, the unit length is 400 ms.

8. Old Mark Set

By setting Old Mark Set (bit 8) to 1, the control program can disable that new messages change to be old ones

even though they have been played (end). If this bit is cleared to 0, new to old change will be enabled and the

change criterion is according to the setting of New/Old Select bit (bit 6).

9. Enhanced ARAM Test

By setting Enhan ARAM Test (bit 11) to 1, the control program can perform extra testing on the ARAM un-used

region. With doing this, more ARAM data loss bits can be detected and avoided to store data onto them.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

GET RECORD MESSAGE INFORMATION

In this mode, there are 10 request codes for the control program to get the related information about a specified

message.

Given the Msg ID (bit 0-6) and New Msg flag (bit 7), the MX93011A-K1 BIOS can provide message recording time,

recording length, attribute and “Del Mark” status according to the Request Code (bit 8-11) as follows :

1. Get the recording time - second. (Request Code = 0000)

2. Get the recording time - minute. (Request Code = 0001)

3. Get the recording time - hour. (Request Code = 0010)

4. Get the recording time - week. (Request Code = 0011)

5. Get the recording length (sec.). (Request Code = 0100)

6. Get the timer status. (Request Code = 0101). The response word is 1 if the MX93011A timer has been set

before with Set Current Time command. Otherwise, the response word is 0.

7. Get the message ICM/MEMO attribute. (Request code = 0110). To show the specified message is of MEMO

type (response word=1) or ICM type (response word=0).

8. Get the Del Mark status (Request Code = 0111). To check if the specified message has been tagged a Del

Mark (response word=1) or not (response word=0).

9. Get the message new/old status. (Request Code = 1000). To check if the specified message has been tagged

an Old Mark (response word=1) or not (response word=0). A new message will be tagged an Old Mark when it

has been played/played end and changes to old messages as Real Del command is issued.

10. Get the OGM existing status (Request Code = 1111). To check if the specified OGM exists (response word=1)

or not (response word=0). Msg ID could only range from 127 to 121.

All the results are reported in the response word.

VOICE PROMPT

In this mode the MX93011A-K1 BIOS plays back a speech segment that the corresponding phrase number is given

in command bit 0-7. Up to 255 speech segments, previously stored in voice prompt ROM, are provided by the

MX93011A-K1 BIOS and pronounced using the speech decompression algorithm. The control program can pause

the playback by setting Pause (bit 8) to 1 or resume from pause by clearing Pause bit to 0. Fast forward playback of

voice prompt is also provided by setting Fast Play (bit 11) to 1. During Voice Prompt mode, the MX93011A-K1

BIOS keeps monitoring the line signal and sends the results in response word to the control program.

The MX93011A-K1 BIOS will terminate Voice Prompt mode when Stop bit is set to 1 on Voice Prompt command.

VOICE ACTIVITY

In this mode the control program can set the VOX threshold in bit 0-11. The hexadecimal numbers for VOX level

are listed in Table 6.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

PERSONAL MAIL

Five functions are provided in this command as follows :

1. Set the personal mailbox number

In this mode the control program can select one out of eight mailboxes (setting in bit 0-2) for recording messages,

playing recorded messages and retrieving message time. Each mailbox manages it own messages and Msg IDs.

Make sure to set the desired mailbox before issuing the message related commands such as Record, Play, Delete

Message and Get Record Message Information.

2. Set the recording message attribute

Before recording a message, the control program can set the attribute of that message to be MEMO or ICM. Clear

bit 3 to zero for recording a message as an ICM or set bit 3 to one for recording a message as a MEMO.

3. Set the digital loop back control

The control program can enable or disable the MX93011A digital loop back path in Record or Line Monitor

operation. By setting Loop Back bit to 1, the loop back path is disabled and the signal received from the Codec

input will not be transmitted back to the Codec output. When this bit is cleared to 0, loop back is enabled and the

received signal will be transmitted back to the Codec output. The default status is the later.

4. Set the output level

The control program can set the level difference between the output (playback) speech and the corresponding

input (recorded-in) speech. By setting the Output Level bit to 1, the output speech level is equal to the input speech

level, and clearing this bit to 0, the output speech level is about 5dB less than the input speech level. The default

status is the later.

5. Set the Codec data format

The control program can select one of two Codec data formats by setting the Codec Format bit. When Codec

Format is cleared to 0, 8-bit µ-law data format is selected, and set to 1, 16-bit linear data format is enabled. At

present, the MX93000 Codec family provide both µ-law and linear formats, and the later is suggested because of

the better speech quality. The default format is 8-bit µ-law.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

9.0 DAM BIOS SERVICE FORMAT AND PROTOCAL

Mode 1. RECORD MODE

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TAIL CUT : 0 ∼ 63 units. One unit length can be 400ms or 200ms (set by BIOS Mode 9).

STOP = 1 : stop recording.

PAUSE = 0 : continue recording.

= 1 : pause recording.

MARKED RECORD = 000 : record a general message.

= 001 : record OGM1 and store it in message 127.

= 010 : record OGM2 and store it in message 126.

= 011 : record OGM3 and store it in message 125.

= 100 : record OGM4 and store it in message 124.

= 101 : record OGM5 and store it in message 123.

= 110 : record OGM6 and store it in message 122.

= 111 : record OGM7 and store it in message 121.

MARK FAIL =1 : give up and stop recording of the new OGMx and recover the original OGMx.

If BIOS Mode 9 ANNC DEL=1, this bit will be ignored.

When MARKED RECORD=000, do not set this bit.

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DTMF : the detected DTMF value during recording.

CONT TONE = 1 : continuous tone is found.

TONE = 1 : call progress tone is found.

VOX = 1 : the input speech power level is under the VOX LEVEL (set by BIOS Mode

12).

MFULL = 1 : ARAM is full and no further recording is possible. In this case, one more

STOP command is needed to completely stop the recording action.

RECORD TIME : recording time until now, 0 ∼ 239 sec.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

DTMF Reference Table

Mode 2. PLAY MODE

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MSG ID : 1 ∼ 127 can be assigned for playing.

DEL MARK = 1 : stop playing and mark the current message with a “Del Mark”. This message

will not be deleted until the BIOS Mode 6 (REAL DEL) command is done.

PAUSE = 0 : continue playing.

= 1 : pause playing.

STOP = 1 : stop playing.

PLAY NEW= 0 : the MSG ID is related to total messages.

= 1 : the MSG ID is related to new messages.

FAST PLAY = 0 : normal play speed.

= 1 : play speed will be up to 33%.

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DTMF and TONE : see RECORD MODE.

PLAY END = 1 : the current message is played end.

PLAY TIME : playing time until now, 0 ∼ 239 sec.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

Mode 3. MESSAGE STATUS MODE

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REQUEST CODE:

∼

0001 number of personal new messages0 ∼ 127

0010 number of personal old messages0 ∼ 127

0011 available time 0 ∼ 65535

0100 BIOS version 1A07H

1000 number of total messages0 ∼ 127

Mode 4. DTMF GENERATOR MODE

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GAIN1, GAIN2 : 0 ∼ 14 denote 3dB ∼ -25dB (2dB/one step), 15 denotes no related signal.

STOP = 1 : stop the DTMF generation.

START = 1 : start the DTMF generation. When this bit is set, GAIN1 and GAIN2 must be

also set and Frequency 1 is put in BUF1 (data address 7) and Frequency 2

in BUF2 (data address 8). 16-bit Frequency = target frequency * 8.192

Note : For single-tone signals (GAIN1=15 or GAIN2=15), the output level is according to GAIN1 or

GAIN2. But for dual-tone signals, the output level is equal to half of sum of two individual signals.

Doing this can avoid saturation of output signals.

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INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

Mode 5. LINE MONITOR MODE

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STOP= 0 : start and continue the line monitor mode.

= 1 : stop the line monitor mode.

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DTMF, CONT TONE, TONE and VOX : see RECORD MODE.

Mode 6. DELETE MESSAGE MODE

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MSG ID : 1 ∼ 127.

DEL ALL OLD = 1 : delete all old messages. (in this case, the MSG ID field is ignored)

REAL DEL = 1 : delete the messages that have “Del Mark” and change the new messages

that have been played to be old messages. (in this case, the MSG ID filed is

ignored)

DEL NEW MSG= 0 : the MSG ID is related to total messages.

= 1 : the MSG ID is related to new messages.

DEL MARK CLR = 1 : clear the message “Del Mark” (set by BIOS Mode 2 DEL MARK = 1).

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INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

Mode 7. SET CURRENT TIME/VOICE PROMPT/SILENCE THRESHOLD MODE

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REQUEST CODE:

∼

MINUTE0001 0 ∼ 59

HOUR 0010 0 ∼ 23

WEEK 0011 0 ∼ 6

Request Code=0110 (set voice prompt configuration),

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IVOP SELECT (internal voice prompt setting),

= 0 : internal voice prompt not selected.

= 1 : internal voice prompt selected and test.

EVOP SELECT (external voice prompt setting),

= 0 : external voice prompt not selected.

= 1 : external voice prompt selected and test.

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IVOP STATUS (internal voice prompt test status),= 0 : test fail;= 1 : test OK.

EVOP STATUS (external voice prompt test status),= 0 : test fail;= 1 : test OK.

(when EVOP STATUS = 1),

EVOP ADDR = 0 : external voice prompt at data space 0800H.

= 1 : external voice prompt at program space 8000H.

EVOP UNIT= 0 : external voice prompt in byte unit.

= 1 : external voice prompt in word unit.

Request Code=0111 (set silence threshold level - used by the silence management algorithm),

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

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SILENCE LEVEL : 0 ∼ 15, the larger the level is, the more speech will be recognized as silence.

0 denotes no silence management.

Please refer to Table 7 for Silence Threshold Level.

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Mode 8. GET CURRENT TIME MODE

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REQUEST CODE, 0000 ∼ 0011 : see BIOS Mode 7.

Mode 9. INITIAL AND TEST MEMORY MODE

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

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ENHAN

ARAM

TEST

OLD

MARK

SET

TAIL

CUT

UNIT

NEW/

OLD

SELECT

ANNC

DEL

VOX

ON/OFF

RECORD

LINE

ON/

OFF

FAST

ARAM

TEST

ARAM

CHECK

INIT

ARAM

INIT ARAM = 1 : initialize the ARAM. The information of ARAM type and ARAM good rate

will be responded in RESP.

ARAM CHECK = 1 : check the ARAM good/bad. The check result is put on bit 8 of RESP.

FAST ARAM TEST (must be used with INIT ARAM),

= 0 : normal ARAM initialization.

= 1 : fast ARAM initialization.

LINE ON/OFF = 0 : not in remote line operation.

= 1 : in remote line operation.

VOX ON/OFF RECORD,

= 0 : record the starting silence.

= 1 : not record the starting silence which power level is under VOX LEVEL.

ANNC DEL= 0 : delete the old OGMx after the new OGMx is recorded.

= 1 : delete the old OGMx before the new OGMx is recorded.

NEW/OLD SELECT (set the judgment point of message new/old attributes),

= 0 : one message that had been played end is taken as an old message.

= 1 : one message that has been played (even not played end) is taken as an old

message.

TAIL CUT UNIT (set the tail cut unit),

= 0 : the tail cut unit is 400 ms.

= 1 : the tail cut unit is 200 ms.

OLD MARK SET,= 0 : enable setting old mark.

= 1 : disable setting old mark. New messages will not change to be old even they

have been played (end). In this case, NEW/OLD SELECT will be ignored.

ENHAN ARAM TEST = 1 : do enhanced ARAM good/bad testing.

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ARAM BIT SIZE : the detected ARAM data bit number in one address access.

ARAM ADDR SIZE : the detected ARAM address space.

ARAM G/B (a conclusion of ARAM initialization or checking),

= 0 : ARAM is bad.

= 1 : ARAM is good.

ARAM GOOD RATE : 0 ∼ 100 %. It is significant when ARAM G/B = 1.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

0000 00 M0000 00

0001 64 K0001 1

0010 128 K0010 2

0011 256 K0100 4

0100 512 K1000 8

0101 1M1111 16

0110 2M

0111 4 M

1000 8 M

1001 16 M

Mode 10. GET RECORD MESSAGE INFORMATION MODE

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MSG ID : 1 ∼ 127.

NEW MSG := 0 : the MSG ID is related to total messages.

= 1 : the MSG ID is related to new messages.

∼

MINUTE0001 00 ∼ 3BH

HOUR 0010 00 ∼ 17H

WEEK 0011 00 ∼ 06H

RECORD LENGTH0100 00 ∼ EFH

TIMER STATUS0101 0 = default timer

1 = timer has set

ICM/MEMO0110 0 = ICM record

1 = MEMO record

DEL MARK

STATUS0111 0 = no del mark

1 = has del mark

MSG NEW/OLD

STATUS1000 0 = no old mark

1 = has old mark

OGM EXISTING

STATUS1111 0 = OGM not exist

1 = OGM exist

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Mode 11. VOICE PROMPT MODE

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

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PHRASE NUMBER : 1 ∼ 255.

PAUSE, STOP and FAST PLAY : see PLAY MODE.

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DTMF, TONE, PLAY END and PLAY TIME : see PLAY MODE.

Mode 12. VOICE ACTIVITY MODE

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VOX LEVEL : see Table 6.

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INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

Mode 13. PERSONAL MAIL MODE

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PERSONAL MAIL : 0 ∼ 7, total 8 personal mailboxes. The MSG IDs of PLAY MODE,

DELETE MESSAGE MODE and GET RECORD MESSAGE

INFORMATION MODE are all limited to the personal mailbox

specified by this command.

MEMO/ICM= 0 : set the attribute of the recorded message to be ICM.

= 1 : set the attribute of the recorded message to be MEMO.

LOOP BACK= 0 : enable loop back.

= 1 : disable loop back. Then in RECORD and LINE MONITOR modes,

the Codec-in data will not be put on the Codec-out path.

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Set Some Status,

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OUTPUT LEVEL (set the relation of the output speech level and corresponding input

speech level),= 0 : the output level is 5dB less than the input level (default setting).

= 1 : the output level (playback) is equal to the input level (recording).

CODEC FORMAT (set the Codec data format),

= 0 : 8-bit µ-law data format is selected.

= 1 : 16-bit linear data format is selected.

The MX93000 Codec family provide this mode.

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INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

TABLE 1. PERFORMANCE TEST FOR TONE DETECTION

(noiseless)

Power (dB)0-3-6-10 -20 -30 -33 -36 -39

p2p (volt)5 3.54 2.5 1.58 .5.158 .112 .079 .056

280 Hzx x x x x x x x x

300 Hzokokokokokokokx x

400 Hzokokokokokokokokx

500 Hzokokokokokokokokx

600 Hzokokokokokokokokx

640 Hzokokokokokokokx x

670 Hzx x x x x x x x x

480+620 Hzokokokokokokx x x

350+440 Hzokokokokokokx x x

* 0 dB is defined as the Vrms of maximum Codec input

** The maximum peak-to-peak voltage (P2P) of Codec input is assumed to be 5V

SNR (dB)40 25 12

detect time delay / off time delay (ms)

300 Hz50 / 40 55 / 40 65 / 40

400 Hz40 / 40 40 / 40 45 / 45

500 Hz40 / 40 40 / 40 45 / 45

640 Hz45 / 40 45 / 40 60 / 35

480+620 Hz40 / 40 45 / 40 50 / 40

350+440 Hz45 / 40 45 / 40 55 / 40

* 0 dB is defined as the Vrms of maximum Codec input

** the detect/off time delay is defined as follows

detect time delayoff time delay

INPUT

RESPONSE

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

TABLE 2. RESOLUTION TEST FOR DUAL TONE (FREQUENCY DETECTABLE RANGE)

RANGE / POWER-4 dB-25 dB

(300 + F2 Hz)F2 > 320 HzF2 > 320 Hz

(640 + F2 Hz)F2 < 620 HzF2 < 620 Hz

TABLE 3. THD DISTORTION TEST FOR DUAL TONE (DISTORTION TOLERANCE)

INPUT / POWER-4 dB-25 dB

(300 + 320 Hz)> 10 dB> 10 dB

(640 + 620 Hz)> 10 dB> 10 dB

* 0 dB is defined as the Vrms of maximum Codec input

TABLE 4. CALL PROGRESS TONE DETECTOR CHARACTERISTICS

PARAMETERMINTYP MAXUNIT

Detection level *-30 dB

Rejection level-37 dB

Frequency range 300 640 Hz

Noise tolerance-12 dB

THD tolerance-10 dB

Rejection frequency range < 280 Hzor> 670 Hz

Minimum signal duration accept50 ms

Maximum response time 50 ms

* 0 dB is defined as the Vrms of maximum Codec input

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

TABLE 5. DTMF CHARACTERISTICS

PARAMETERMINTYP MAXUNIT

DTMF signal level for detection *-43 0 dB

DTMF twist (high/low tone)± 9 dB

DTMF noise tolerance-10 dB

DTMF tone duration accept50 ms

DTMF interdigit pause accept50 ms

DTMF frequency deviation accept limit± 1.5%

DTMF frequency deviation reject limit± 3%

Tone generator level-25 +3 dB

Tone generator frequency accuracy ± 0.1%

Tone generator level accuracy ± 0.5 dB

* 0 dB is defined as the Vrms of maximum Codec input

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

TABLE 6. VOX THRESHOLD

0 dB is defined as the Vrms of maximum Codec input.

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

TABLE 7. SILENCE THRESHOLD LEVEL

1-58

2-55

3-52

4-49

5-46

6-43

7-40

8-37

9-34

10 -31

11 -28

12 -25

13 -22

14 -19

15 -16

0 dB : maximum input of sinusoidal wave

TABLE 8. ECHO CANCELLER PERFORMANCE *

Test Description

Final Echo Return Loss Improvement (ERLI) (Singletalk mode)> 28 dB

Maximum tail length 12 ms

Convergence Rate (Singletalk mode)

500 ms after initialization with cleared register and with near-end signal

set to zero at initialization time

> 28 dB

Infinite Return Loss Convergence

Return Echo Loss Improvement 500 ms after echo path is interrupted > 28 dB

* test signal : band-limited white-noise (300-3400 Hz)

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

TABLE 9. MAXIMUM COMMAND RESPONSE TIME, 4Mx4 ARAM

COMMAND MAX RESP TIME (ms)

Record Mode :

1. start

2. normal

3. stop

Play Mode :

1. start

2. normal

3. stop

Message Status Mode :

1. get message number

2. get ARAM available time48

DTMF Generator Mode 1

Line Monitor Mode 7

Delete Message Mode :

1. delete one message

2. delete all old messages

3. real delete

4. clear one message ‘Del Mark’

1090

2530

2540

Set Current Time/Voice Prompt/Silence Threshold Mode 1

Get Current Time Mode 1

Initial and Test Memory Mode :

1. normal ARAM initialization

2. fast ARAM initialization

3. ARAM good/bad check

4. enhanced ARAM test

5. other misc. setting

103300

17500

138

Get Record Message Information Mode 24

Voice Prompt Mode :

1. start

2. normal

3. stop

Voice Activity Mode 1

Personal Mail Mode 1

INDEX

MX93011A

APPLICATION NOTE [K1 VERSION]

ACRONIX

NTERNATIONAL

O.,

TD.

HEADQUARTERS:

No. 3, Creation Road III, Science-Based Industrial Park, Hsin Chu, Taiwan, R.O.C.

TEL:+886-3-578-8888

FAX:+886-3-578-8887

TAIPEI OFFICE:

12F, No. 4, Min-Chuan E.Rd., Sec 3, Taipei, Taiwan, R.O.C.

TEL:+886-3-509-3300

FAX:+886-3-509-2200

EUROPE OFFICE:

Grote Winkellaan 95, Bus 1 1853 Strombeek, Belgium

TEL:+32-2-267-7050

FAX:+32-2-267-9700

SINGAPORE OFFICE:

5 Jalan Masjid Kembangan Court #01-12 Singapore 418924

TEL:+65-747-2309

FAX:+65-748-4090

MACRONIX AMERICA, INC.

1338 Ridder Park Drive, San Jose, CA95131 U.S.A.

TEL:+1-408-453-8088

FAX:+1-408-453-8488

JAPAN OFFICE:

NKF Bld. 8F, 1-2 Higashida-cho, Kawasaki-ku

Kawasaki-shi, Kanagawa 210, Japan.

TEL:+81-44-246-9100

FAX:+81-44-246-9105

INDEX