3 Volt Intel® Advanced+ Boot Block Flash Memory Stacked-CSP Family
B.3
Block Lock Status Register
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 VCC 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.
Table 23. Block Status Register
Offset
Length
Description
Address
Value
Notes
(BA+2)h
1
Block Lock Status Register
BA+2:
--00 or --01
1
BSR.0 Block Lock Status
0 = Unlocked
BA+2:
(bit 0): 0 or 1
1 = Locked
BSR.1 Block Lock-Down Status
0 = Not locked down
1 = Locked down
BA+2:
BA+2:
(bit 1): 0 or 1
(bit 2–7): 0
BSR 2–7: Reserved for future use
NOTE: 1. BA = The beginning location of a Block Address (i.e., 008000h is the beginning location of block 1
in word mode.)
B.4
CFI Query Identification String
The 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 24. CFI Identification
Hex
Code
Offset
Length
Description
Query-unique ASCII string “QRY“
Addr.
Value
10h
3
10
11:
12:
13:
14:
15:
16:
17:
18:
19:
1A:
--51
--52
--59
--03
--00
--35
--00
--00
--00
--00
--00
“Q”
“R”
“Y”
13h
15h
17h
19h
2
2
2
2
Primary vendor command set and control interface ID code.
16-bit ID code for vendor-specified algorithms
Extended Query Table primary algorithm address
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
54
Datasheet
INTEL [ INTEL ]
