AT49BV322AT ATMEL [ATMEL Corporation], AT49BV322AT Datasheet - Page 3

• Manufacturer Part Number: AT49BV322AT
• Description: 32-megabit (2M x 16/4M x 8) 3-volt Only Flash Memory
• Manufacturer: ATMEL [ATMEL Corporation]

Block Diagram
3308H–FLASH–5/04
A0 - A20
Y-DECODER
X-DECODER
ADDRESS
BUFFER
LATCH
INPUT
A six-byte command (Enter Single Pulse Program Mode) sequence to remove the requirement
of entering the three-byte program sequence is offered to further improve programming time.
After entering the six-byte code, only single pulses on the write control lines are required for
writing into the device. This mode (Single Pulse Byte/Word Program) is exited by powering
down the device, or by pulsing the RESET pin low for a minimum of 500 ns and then bringing
it back to V
not work while in this mode; if entered they will result in data being programmed into the
device. It is not recommended that the six-byte code reside in the software of the final product
but only exist in external programming code.
The BYTE pin controls whether the device data I/O pins operate in the byte or word configura-
tion. If the BYTE pin is set at logic “1”, the device is in word configuration, I/O0 - I/O15 are
active and controlled by CE and OE.
If the BYTE pin is set at logic “0”, the device is in byte configuration, and only data I/O pins
I/O0 - I/O7 are active and controlled by CE and OE. The data I/O pins I/O8 - I/O14 are tri-
stated, and the I/O15 pin is used as an input for the LSB (A-1) address function.
OUTPUT
BUFFER
CC
. Erase, Erase Suspend/Resume and Program Suspend/Resume commands will
COMPARATOR
I/O0 - I/O15/A-1
MEMORY
IDENTIFIER
REGISTER
REGISTER
Y-GATING
STATUS
MAIN
DATA
BUFFER
INPUT
WRITE STATE
COMMAND
REGISTER
MACHINE
PROGRAM/ERASE
VOLTAGE SWITCH
AT49BV322A(T)
CE
WE
OE
RESET
BYTE
RDY/BUSY
VPP
VCC
GND
3