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参数资料
| 型号： | W25Q64CVSSIG |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | PROM |
| 英文描述： | 64M X 1 SPI BUS SERIAL EEPROM, PDSO8 |
| 封装： | 0.208 INCH, GREEN, SOIC-8 |
| 文件页数： | 57/79页 |
| 文件大小： | 1086K |
| 代理商： | W25Q64CVSSIG |
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W25Q64CV
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7.2.37 Erase Security Registers (44h)
The W25Q64CV offers three 256-byte Security Registers which can be erased and programmed
individually. These registers may be used by the system manufacturers to store security and other
important information separately from the main memory array.
The Erase Security Register instruction is similar to the Sector Erase instruction. A Write Enable
instruction must be executed before the device will accept the Erase Security Register Instruction (Status
Register bit WEL must equal 1). The instruction is initiated by driving the /CS pin low and shifting the
instruction code “44h” followed by a 24-bit address (A23-A0) to erase one of the three security registers.
ADDRESS
A23-16
A15-12
A11-8
A7-0
Security Register #1
00h
0 0 0 1
0 0 0 0
Don’t Care
Security Register #2
00h
0 0 1 0
0 0 0 0
Don’t Care
Security Register #3
00h
0 0 1 1
0 0 0 0
Don’t Care
The Erase Security Register instruction sequence is shown in Figure 35. The /CS pin must be driven high
after the eighth bit of the last byte has been latched. If this is not done the instruction will not be executed.
After /CS is driven high, the self-timed Erase Security Register operation will commence for a time
duration of tSE (See AC Characteristics). While the Erase Security Register cycle is in progress, the Read
Status Register instruction may still be accessed for checking the status of the BUSY bit. The BUSY bit is
a 1 during the erase cycle and becomes a 0 when the cycle is finished and the device is ready to accept
other instructions again. After the Erase Security Register cycle has finished the Write Enable Latch
(WEL) bit in the Status Register is cleared to 0. The Security Register Lock Bits LB[3:1] in the Status
Register-2 can be used to OTP protect the security registers. Once a lock bit is set to 1, the corresponding
security register will be permanently locked, Erase Security Register instruction to that register will be
ignored (See 7.1.9 for detail descriptions).
/CS
CLK
DI
(IO
0)
DO
(IO
1)
Mode 0
Mode 3
0
1
2
3
4
5
6
7
Instruction (44h)
High Impedance
8
9
29
30
31
24-Bit Address
23
22
2
1
0
*
Mode 0
Mode 3
= MSB
*
Figure 35. Erase Security Registers Instruction Sequence
相关PDF资料 |
PDF描述 |
|---|---|
| W25Q64CVZPAP | 64M X 1 SPI BUS SERIAL EEPROM, PDSO8 |
| WMS128K8C-25CQE | 128K X 8 STANDARD SRAM, 25 ns, CDIP32 |
| WMF512K8X-150DEC5 | 512K X 8 FLASH 5V PROM, 150 ns, CDSO32 |
| WME128K8X-200DEC | 128K X 8 EEPROM 5V, 200 ns, CDSO32 |
| WMF512K8X-70FEM5 | 512K X 8 FLASH 5V PROM, 70 ns, CDFP32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| W25Q64CVSSIP | 制造商:WINBOND 制造商全称:Winbond 功能描述:3V 64M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI |
| W25Q64CVTCAG | 制造商:WINBOND 制造商全称:Winbond 功能描述:3V 64M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI |
| W25Q64CVTCAP | 制造商:WINBOND 制造商全称:Winbond 功能描述:3V 64M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI |
| W25Q64CVTCIG | 制造商:WINBOND 制造商全称:Winbond 功能描述:3V 64M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI |
| W25Q64CVTCIP | 制造商:WINBOND 制造商全称:Winbond 功能描述:3V 64M-BIT SERIAL FLASH MEMORY WITH DUAL AND QUAD SPI |
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