參數(shù)資料
型號: NAND01GW3B2CN1E
廠商: NUMONYX
元件分類: PROM
英文描述: 128M X 8 FLASH 3V PROM, 25000 ns, PDSO48
封裝: 12 X 20 MM, ROHS COMPLIANT, PLASTIC, TSOP-48
文件頁數(shù): 27/65頁
文件大?。?/td> 1473K
代理商: NAND01GW3B2CN1E
NAND01G-B2C
Device operations
33/65
6.9
Read ONFI signature
To recognize NAND flash devices that are compatible with ONFI 1.0 command set, the
Read Electronic Signature command can be issued, followed by an address of 20h. The
next four-byte output is the ONFI signature, which is the ASCII encoding of the ‘ONFI’ word.
Reading beyond four bytes produces indeterminate values. The device remains in this state
until a new command is issued.
Figure 15 describes the read ONFI signature waveforms and Table 15 defines the output
bytes.
Table 14.
Electronic signature byte/word 4
I/O
Definition
Value
Description
I/O1-I/O0
Page size
(without spare area)
0 0
0 1
1 0
1 1
1Kbyte
2Kbytes
Reserved
I/O2
Spare area size
(byte / 512-byte)
0
1
8
16
I/O3
Minimum sequential
access time
0
1
50 ns
30 ns
I/O5-I/O4
Block size
(without spare area)
0 0
0 1
1 0
1 1
64 Kbytes
128 Kbytes
256 Kbytes
Reserved
I/O6
Organization
0
1
x8
x16
I/O7
Not used
Reserved
Table 15.
Read ONFI signature
Byte
Value
ASCII character
1st byte
4Fh
O
2nd byte
4Eh
N
3rd byte
46h
F
4th byte
49h
I
5th byte
Undefined
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