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| 型号： | W28V400 |
| 英文描述： | FLASH |
| 中文描述： | 闪光 |
| 文件页数： | 11/48页 |
| 文件大小： | 427K |
| 代理商： | W28V400 |
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W28V400B/T
Publication Release Date: November 18, 2002
- 11 -
Revision A3
Read Identifier Codes Operation
The read identifier codes operation outputs the manufacturer code and device code (refer to Figure 4).
Using the manufacturer and device codes, the system CPU can automatically match the device with
its proper algorithms.
Reserved for
Future Implementation
Device Code
Manufacture Code
[A17-A0]
3FFF
00002
00001
00000
Figure 4. Device Identifier Code Memory Map
Write
Writing commands to the CUI enable reading of device data and identifier codes. They also control
inspection and clearing of the status register. When V
DD
= V
DD1/2/3/4
and used. V
PP
= V
PPH1/2/3
, the CUI
additionally controls block erasure and word/byte write.
The Block Erase command requires appropriate command data and an address within the block to be
erased. The Word/Byte Write command requires the command and address of the location to be
written.
The CUI does not occupy an addressable memory location. A write occurs when #WE and #CE are
active (low). The address and data needed to execute a command are latched on the rising edge of
#WE or #CE, whichever occurs first. Standard microprocessor write timings are used.
Figures 15 and 16 illustrate #WE and #CE controlled write operations.
9. COMMAND DEFINITIONS
When V
PP
≤
V
PPLK
, read operations from the status register, identifier codes, or blocks are enabled.
Setting V
PPH1/2/3
= V
PP
enables successful block erase, full chip erase, word/byte write and lock-bit
configuration operations.
Device operations are selected by writing specific commands into the CUI. Table 4 defines these
commands.
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相关代理商/技术参数 |
参数描述 |
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| W28V400B | 制造商:WINBOND 制造商全称:Winbond 功能描述:4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY |
| W28V400BT85C | 制造商:WINBOND 制造商全称:Winbond 功能描述:4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY |
| W28V400T | 制造商:WINBOND 制造商全称:Winbond 功能描述:4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY |
| W28V400TT85C | 制造商:WINBOND 制造商全称:Winbond 功能描述:4M(512K x 8/256K x 16) SMARTVOLTAGE FLASH MEMORY |
| W28WH | 制造商:ETERNA 功能描述:TRACKLIGHT, FLEXIBLE TRACK COUPLER |
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