W49V002
256K x 8 CMOS FLASH MEMORY WITH LPC INTERFACE
GENERAL DESCRIPTION
The W49V002A is a 2-megabit, 3.3-volt only CMOS flash memory organized as 256K ´ 8 bits. The
device can be programmed and erased in-system with a standard 3.3V power supply. A 12-volt VPP is
not required. The unique cell architecture of the W49V002A results in fast program/erase operations with
extremely low current consumption. This device can operate at two modes, Programmer bus interface
mode and LPC bus interface mode. As in the Programmer interface mode, it acts like the traditional
flash but with a multiplexed address inputs. But in the LPC interface mode, this device complies with the
Intel LPC specification 1.0. The device can also be programmed and erased using standard EPROM
programmers.
FEATURES
·Single 3.3-volt operations:
3.3-volt Read
3.3-volt Erase
3.3-volt Program
Fast Program operation:
Byte-by-Byte programming: 50 mS (typ.)
Fast Erase operation: 150 mS (typ.)
Endurance: 10K cycles (typ.)
Twenty-year data retention
Hardware data protection
#TBL & #WP serve as hardware protection
One 16K bytes Boot Block with lockout
protection
Two 8K bytes Parameter Blocks
Four Main Memory Blocks (with 32K bytes, 64K
bytes, 64K bytes, 64K bytes each)
Low power consumption
Active current: 25 mA (typ.)
Standby current: 20 mA (typ.)
Automatic program and erase timing with
internal VPP generation
End of program or erase detection
Toggle bit
Data polling
Latched address and data
TTL compatible I/O
Available packages: 32L PLCC and 32L
STSOP
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