W19B(L)320ST/B
1. GENERAL DESCRIPTION
The W19B(L)320ST/B is a 32Mbit, 2.7−3.6(3.0−3.6) volt CMOS flash memory organized as 4M
×
8 or
2M
×
16 bits. For flexible erase capability, the 32 Mbits of data are divided into eight 8KB, and sixty-
three 64KB sectors. The word-wide (×16) data appears on DQ15−DQ0, and byte-wide (×8) data
appears on DQ7−DQ0. The device can be programmed and erased in-system with a standard
2.7−3.6V(3.0−3.6V) power supply. A 12-volt V
PP
is not required. The unique cell architecture of the
W19B320ST/B results in fast program/erase operations with extremely low current consumption
(compared to other comparable 3-volt flash memory products). The device can also be programmed
and erased by using standard EPROM programmers.
2. FEATURES
Performance
•
2.7~3.6-volt write (program and erase)
operations (W19B320S)
•
3.0~3.6-volt write (program and erase)
operations (W19L320S)
•
Fast write operation
−
Sector erase time: 0.7 Sec (typ.)
−
Chip erase time: 49 Sec (typ.)
−
Byte programming time: 5
µS
(typ.)
•
Read access time: 90 nS
•
Typical program/erase cycles:
−
100K
•
Twenty-year data retention
•
Ultra low power consumption
−
Active current (Read): 10 mA (typ.) at 5 MHz
−
Standby current: 0.2
µA
(typ.)
Architecture
•
Sector erase architecture
−
Eight 8KB, and sixty-three 64KB sectors
−
Top or bottom boot block configurations
available
−
Supports full chip erase
•
Security Sector Size: 256 Bytes
−
The Security Sector is an OTP; once the sector
is programmed, it cannot be erased
•
JEDEC standard byte-wide and word-wide
pinouts
•
TTL compatible I/O
•
Manufactured on WinStack 0.18µm process
technology
•
Available packages: 48-pin TSOP and 48-ball
TFBGA (8x11mm)
Software Features
•
Compatible with common Flash Memory
Interface (CFI) specification
−
Flash device parameters stored directly on
the device
−
Allows software driver to identify and use a
variety of different current and future Flash
products
•
Erase Suspend/Erase Resume
−
Suspends erase operations to allow
programming in same bank
•
End of program detection
−
Software method: Toggle bit/Data polling
•
Unlock Bypass Program command
−
Reduces overall programming time when
issuing multiple program command
sequences
Hardware Features
•
Ready/#Busy output (RY/#BY)
−
Detect program or erase cycle completion
•
Hardware reset pin (#RESET)
−
Reset the internal state machine to the read
mode
-4-
WINBOND [ WINBOND ]
