W28J321B/T
32M(2M × 16)
BOOT BLOCK FLASH MEMORY
Table of Contents-
1. GENERAL DESCRIPTION.................................................................................................................. 3
2. FEATURES ......................................................................................................................................... 3
3. PRODUCT OVERVIEW ...................................................................................................................... 4
4. BLOCK DIAGRAM .............................................................................................................................. 5
Block Organization........................................................................................................................... 6
5. PIN CONFIGURATION ....................................................................................................................... 6
6. PIN DESCRIPTION............................................................................................................................. 7
7. PRINCIPLES OF OPERATION........................................................................................................... 8
Data Protection ................................................................................................................................ 8
8. BUS OPERATION............................................................................................................................. 11
Read............................................................................................................................................... 11
Output Disable ............................................................................................................................... 11
Standby .......................................................................................................................................... 11
Reset.............................................................................................................................................. 11
Read Identifier Codes .................................................................................................................... 12
OTP(One Time Program) Block..................................................................................................... 13
Write............................................................................................................................................... 14
9. COMMAND DEFINITIONS................................................................................................................ 14
Read Array Command ................................................................................................................... 16
Read Identifier Codes Command................................................................................................... 16
Read Status Register Command ................................................................................................... 16
Clear Status Register Command ................................................................................................... 17
Block Erase Command .................................................................................................................. 17
Full Chip Erase Command............................................................................................................. 17
Word Write Command.................................................................................................................... 18
Block Erase Suspend Command................................................................................................... 18
Word Write Suspend Command .................................................................................................... 19
Set Block and Permanent Lock-Bit Commands............................................................................. 19
Clear Block Lock-Bits Command ................................................................................................... 20
OTP Program Command ............................................................................................................... 20
Block Locking by the #WP ............................................................................................................. 21
Publication Release Date: November 18, 2002
- 1 -
Revision A3
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