APExx24 Series
Rev 1.1 2003/9/2
1
1.0 General Description
The APExx24 series are very low cost voice and melody synthesizer with 4-bits CPU. They have various
features including 4-bits ALU, ROM, RAM, I/O ports, timers, clock generator, voice and melody
synthesizer, and PWM (Direct drive) or D/A current outputs, etc. The audio synthesizer contains one
voice-channel and two melody-channels. Furthermore, they consist of 27 instructions in these devices.
W ith CMOS technology and halt function can minimize power dissipation. Their architectures are similar
to RISC, with two stages of instruction pipeline. They allow all instructions to be executed in a single
cycle, except for program branches and data table read instructions (which need two instruction cycles).
2.0 Features
(1) Single power supply can operate from 2.4V to 5.5V at 4MHz or 8MHz.
(2) Program ROM: 64k x 10 bits
(3) 1 set of 16-bits DPR can access up to 64k x 10 bits melody dat a memory space, and 1 set of 20-bit s
VPR can access up to 1024k x 10 bits voice data memory space.
Product Voice Duration (sec) Voice Pointer (VPR) ROM Size (10-bits)
APE12724 127 19-bits 384k
APE17024 170 19-bits 512k
APE25524 255 20-bits 768k
APE34024 340 20-bits 1024k
(4) Data Registers:
a). 128 x 4-bits data RAM (00-7Fh)
b). Unbanked special function registers (SFR) range: 00h-2Fh
(5) I/O Ports:
a). PRA: 4-bits I/O Port A (10h) can be programmed to input/output individually. (Regist er control)
b). PRB: 4-bits I/O Port B (13h) can be configured to input/output individually. (Mask option)
c). PRC: 4-bits I/O Port C (14h) can be programmed to input/ out put individually. (Register control)
d). PRD: 4-bits I/O Port D (15h) can be programmed t o input/output individually. (Register control)
e). PRE: 4-bits I/O Port E (17h) can be programmed to input/output individually. (Register control)
f). PRF: 4-bits I/O Port F (18h) can be programmed to input/output individually. (Register control)
(6) On-chip clock generator: Resistive Clock Driv e (RM) or Crystal oscillator (HM)
(7) Timer: 1-set Voic e Interrupt (Timer0: a 9-bits auto-reload timer/counter).
(8) Stack: 2-level subroutine nesting.
(9) Bu i lt -i n 4 Lev el Vol u me C ontrol ca n be pr o gr amm ed .
(10) Built-in 8 Level DAC Current Control can be configured. (Mask opt ion)
(11) Built-in IR Carry Output: Port B[1] can be configured as IR pin by 38k / 56kHz. (Mask option)