W19B320AT/B Data Sheet
4M × 8/2M × 16 BITS
3V FLEXIBLE BANK FLASH MEMORY
Table of Contents-
1.
2.
3.
4.
5.
6.
GENERAL DESCRIPTION ......................................................................................................... 4
FEATURES................................................................................................................................. 4
PIN CONFIGURATIONS ............................................................................................................ 5
BLOCK DIAGRAM ...................................................................................................................... 6
PIN DESCRIPTION..................................................................................................................... 6
FUNCTIONAL DESCRIPTION ................................................................................................... 7
6.1
Device Bus Operation..................................................................................................... 7
6.1.1 Word/Byte Configuration ..................................................................................................7
6.1.2 Reading Array Data..........................................................................................................7
6.1.3 Writing Commands/Command Sequences.......................................................................7
6.1.4 Simultaneous Read/Write Operations with Zero Latency .................................................8
6.1.5 Standby Mode ..................................................................................................................8
6.1.6 Automatic Sleep Mode .....................................................................................................8
6.1.7 #RESET: Hardware Reset Pin..........................................................................................9
6.1.8 Output Disable Mode........................................................................................................9
6.1.9 Autoselect Mode...............................................................................................................9
6.1.10 Sector/Sector Block Protection and Unprotection...........................................................9
6.1.11 Write Protect (#WP) .....................................................................................................10
6.1.12 Temporary Sector Unprotect ........................................................................................10
6.1.13 Security Sector Flash Memory Region .........................................................................10
6.1.14 Hardware Data Protection ............................................................................................11
6.2
Command Definitions ................................................................................................... 12
6.2.1 Reading Array Data........................................................................................................12
6.2.2 Reset Command.............................................................................................................12
6.2.3 AUTOSELECT Command Sequence.............................................................................13
6.2.4 Byte/Word Program Command Sequence......................................................................13
6.2.5 Unlock Bypass Command Sequence .............................................................................14
6.2.6 Chip Erase Command Sequence ...................................................................................14
6.2.7 Sector Erase Command Sequence ................................................................................14
6.2.8 Erase Suspend/Erase Resume Commands ...................................................................15
6.3
Write Operation Status ................................................................................................. 16
6.3.1 DQ7: #Data Polling.........................................................................................................16
6.3.2 RY/#BY: Ready/#Busy ...................................................................................................16
6.3.3 DQ6: Toggle Bit I............................................................................................................16
Publication Release Date: December 27, 2005
- 1 -
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