參數(shù)資料
型號: GT28F320D18B110
英文描述: x16 Flash EEPROM
中文描述: x16閃存EEPROM
文件頁數(shù): 74/83頁
文件大小: 836K
代理商: GT28F320D18B110
28F320D18
70
Product Preview
A.3
Block Lock Status
The block status register indicates whether an erase operation completed successfully or whether a
given block is locked or can be accessed for flash program/erase operations.
Block Erase Status (BSR.1) allows system software to determine the success of the last block erase
operation. BSR.1 can be used just after power-up to verify that the V
CC
supply was not
accidentally removed during an erase operation. This bit is only reset by issuing another erase
operation to the block. The block status register is accessed from word address 02h within each
block.
NOTE:
1.
BA = The beginning location of a Block Address (i.e., 008000h is block 1’s (64-KB block) beginning location
in word mode).
A.4
CFI Query Identification String
The CFI Query Identification String provides verification that the component supports the
Common Flash
Interface
specification. It also indicates the specification version and supported
vendor-specified command set(s)
.
Table 16. Block Lock Status Register
Offset
Length
Description
Address
Value
(BA+2)h
(1)
1
Block Lock Status Register
BA+2:
--00 or --01
BSR.0 Block Lock Status
0 = Unlocked
1 = Locked
BA+2:
(bit 0): 0 or 1
BSR.1 Block Lock-Down Status
0 = Not locked down
1 = Locked down
BA+2:
(bit 1): 0 or 1
BSR 2–7: Reserved for Future Use
BA+2:
(bit 2–7): 0
Table 17. CFI Identification
Offset
Length
Description
Address
Hex Code
Value
10h
3
Query-unique ASCII string “QRY”
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
1A:
--51
--52
--59
--03
--00
--39
--00
--00
--00
--00
--00
Q
R
Y
13h
2
Primary vendor command set and control interface ID code
16-bit ID code for vendor-specified algorithms
Extended Query Table primary algorithm address
15h
2
17h
2
Alternate vendor command set and control interface ID code
0000h means no second vendor-specified algorithm exists
Secondary algorithm Extended Query Table address
0000h means none exists
19h
2
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