Numonyx™ StrataFlash® Cellular Memory (M18)
Table 50: Example of Query Structure Output of x16 Devices (Sheet 2 of 2)
Word Addressing
Hex Code
Byte Addressing
Hex Code
Offset
X - A0
Value
Offset
Value
A
A15 - A0
PrVendor
AX - A0
A7 - A0
ID#
00015h
00016h
00017h
00018h
PLO
00015h
P_IDHI
PHI
TblAdr
AltVendor
ID#
00016h
00017h
00018h
A_IDLO
A_IDHI
12.2
Block 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. Only issuing
another operation to the block resets this bit. The Block Status Register is accessed
from word address 02h within each block.
Table 51: Block Status Register
Offset
Length
Description
Block Lock Status Register
Address
Value
(BA + 2)h
1
BA + 2
-00 or -01
BSR.0 Block Lock Status:
0 = Unlocked
(BA + 2)h
1
BA + 2
(bit 0): 0 or 1
1 = Locked
BSR.1 Block Lock Down Status:
0 = Not Locked Down
1 = Locked Down
(BA + 2)h
(BA + 2)h
1
1
BA + 2
BA + 2
(bit 0): 0 or 1
(bit 0): 0 or 1
BSR.2-3, 6-7: Reserved for future use
Note: BA = The beginning of a Block Address; that is, 020000h is the beginning location in word mode of the 256-KB block 1.
12.3
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 52: CFI Identification (Sheet 1 of 2)
Offset
Length
Description
Address
Hex Code
Value
10
11
12
--51
--52
--59
“Q”
“R”
“Y”
10h
3
Query unique ASCII string “QRY”
April 2008
309823-10
Datasheet
111
NUMONYX [ NUMONYX B.V ]
