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 VPP 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)
• TTL compatible I/O
operations (W19B320S)
• Manufactured on WinStack 0.18µm process
• 3.0~3.6-volt write (program and erase)
technology
operations (W19L320S)
• Available packages: 48-pin TSOP and 48-ball
• Fast write operation
TFBGA (8x11mm)
Software Features
− 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.)
• 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
Architecture
− Software method: Toggle bit/Data polling
• Sector erase architecture
− Eight 8KB, and sixty-three 64KB sectors
• Unlock Bypass Program command
− Reduces overall programming time when
issuing multiple program command
sequences
− Top or bottom boot block configurations
available
− Supports full chip erase
Hardware Features
• Security Sector Size: 256 Bytes
• Ready/#Busy output (RY/#BY)
− Detect program or erase cycle completion
• Hardware reset pin (#RESET)
− The Security Sector is an OTP; once the sector
is programmed, it cannot be erased
• JEDEC standard byte-wide and word-wide
− Reset the internal state machine to the read
pinouts
mode
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WINBOND [ WINBOND ]
