Numonyx® Embedded Flash Memory (J3 65 nm) Single Bit per Cell (SBC)
Datasheet March 2010
18 208032-02
4.3 S ignal Descri ptions
Table 3 lists the active signals used on J3 65 nm SBC and provides a description of
each.
Table 3: Signal De scriptions f or J3 65 nm SBC
Symbol Type Name and Function
A0 Input BYTE-SELECT ADDRESS: Selects between high and low byte when the device is in x8 mode. This
address is latche d during a x8 program cycle. Not used in x16 mode (i.e., the A0 input buffe r is
turned off when BYTE# is high).
A[MAX:1] Input
ADDRESS INPUTS: Inputs for addresses during read and program operations. Addresses are
internally latched during a program cycle:
32-Mbit — A[21:1]
64-Mbit— A[22:1]
128-Mbit — A[23:1]
DQ[7:0] Input/
Output
LOW-B YTE DATA BUS : Inputs data during buffer writes and programming, and inputs commands
during CU I writes. Output s array, CFI, identifi er, or status data in the appropriate read mode. Data
is internally latched during write operations.
DQ[15:8] Input/
Output
HIGH-BYTE DA TA BUS: Inpu ts da ta du ri ng x16 bu ff er write s and programm ing ope ration s.
Outputs array, CFI, or identifier data in the appropriate read mode; not used for Status Register
reads. Data is internally latched during write operations in x16 mode. D[15:8] float in x8 mode.
CE[2:0] Input
CHIP ENABLE: Activates the 32-, 64-, 128-Mbit devices’ control logic, input buffers, decoders, and
sense ampl i fiers. When the device is de- se l ected (see Table 17, “Chip Enable Truth Table
for 32-, 64-, 128-Mb” on page 30), power reduces to standby levels.
All timing specifications are the same for these three signals. Device selection occurs with the first
edge of CE0, CE1, or CE2 that enables the device. Device deselection occurs with the first edge of
CE0, CE1 , o r CE 2 that d i sables the de vi ce (see Table 17, “Chip Enable Truth Table for
32-, 64-, 128-Mb” on page 30).
RP# Input RESET: RP#-low resets internal automation and puts the device in power-down mode. RP#-high
enables normal operatio n. Exit from reset sets the device to read array mode. When driven low,
RP# inhibits write operations which provides data protection during power transitions.
OE# Input OUTPUT ENABLE: Activates the device’s outputs through the data buffers during a read cycl e.
OE# is active low.
WE# Input WRITE ENABLE: Controls writes to the CUI, the Write Buffer, and array blocks. WE# is active low.
Addresses a nd da ta are latch ed on the risin g ed ge of WE#.
STS Open Drain
Output
STATUS: Indicates the status of the internal state machine. When configured in level mode
(default), it acts as a RY/BY# signal. When configured in one of its pulse modes, it can pulse to
indicate progr am and/or er ase completion. For alternate configuration s of the Status signal, see the
Configur atio ns command and Sect io n 9.7, “St atu s Signal ” on page 41. STS is to be tied
to VCCQ with a pull-up resistor.
BYTE# Input
BYTE EN ABLE: BYTE#-lo w plac es the device i n x8 mode; data is input or output on D[7:0], while
D[1 5:8 ] is pl ac ed in H igh - Z . A ddres s A0 s e le ct s b et we en th e hi gh an d l ow by te. BY T E# -h ig h pl ac e s
the device in x16 mode, and turns off the A0 input buff er, the ad dress A 1 become s the lowe st- order
address bit.
VPEN Input ERASE / PROGRAM / BLOCK LOCK ENABLE: For erasing array blocks, programming data, or
configuring lock - b its.
With V PEN ≤ VPENLK, memory contents cannot be altered.
VCC Power CORE Power Supply: Core (logic ) source voltage. W rites to the f lash arr a y are inhibited wh en VCC
≤ VLko.
Caution: Device operation at invalid Vcc voltages should not be attempted.
VCCQ Power I/O Power Supply: Power supply for In pu t/Out put bu ffers.This ball ca n be tied di rectly to VCC.
VSS Supply GROUND: Ground reference for device logic voltages. Connect to system ground.
NC — No Connect: Lead is not internally connected; it may be driven or floated.
RFU — Reserved for Future Use: Balls designated as RFU are reserved by Numonyx for future device
functionality and enhancement.