W19B320B Datasheet, PDF (4/51 Pages) Winbond – 32Mbit, 2.7~3.6-volt single bank CMOS flash memory

W19B320BT/B DATASHEET
1. GENERAL DESCRIPTION
The W19B320BT/B is a 32Mbit, 2.7~3.6-volt single bank CMOS flash memory organized as 4M x 8 or 2M × 16
bits. The word-wide (× 16) data appears on DQ15-DQ0, and byte-wide (x 8) data appears on DQ7-DQ0. The
device can be programmed and erased in-system with a standard 3.0-volt power supply. A 12-volt VPP is not
required. The unique cell architecture of the W19B320BT/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
• Compatible with common Flash Memory
Interface (CFI) specification
• Fast write operation
− Sector erases time: 0.4 Sec (typical)
− Flash device parameters stored directly on the
device
− Chip erases time: 30Sec (typical)
− Byte/Word programming time: 7/9 μs (typical)
• Read access time: 70 ns
• Typical program/erase cycles: 100K
• Twenty-year data retention
• Ultra low power consumption
− Active current (Read): 10 mA (typical)
− Active current (Read while Erase): 21 mA
(typical)
− Standby current: 0.2 μA (typical)
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
− Allows software driver to identify and use a
variety of different current and future Flash
products
• 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
• #WP/ACC input pin
− Write protect (#WP) function allows protection
of two outermost boot sectors, regardless of
sector protection status
Temperature range
• Extended temperature range (-20℃ to 85 ℃)•
• Manufactured on WinStack 0.13μm process
technology
• Available packages: 48-pin TSOP
Software Features
Publication Release Date:Dec, 22, 2008
-4-
Revisionv A5