MBM29LV800BA-120PFTR Просмотр технического описания (PDF) - Fujitsu
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MBM29LV800BA-120PFTR Datasheet PDF : 59 Pages
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MBM29LV800TA-70/-90/-12/MBM29LV800BA-70/-90/-12
The manufacturer and device codes may also be read via the command register, for instances when the
MBM29LV800TA/BA are erased or programmed in a system without access to high voltage on the A9 pin. The
command sequence is illustrated in Table 7. (Refer to Autoselect Command section.)
Byte 0 (A0 = VIL) represents the manufacturer’s code (Fujitsu = 04H) and (A0 = VIH) represents the device identifier
code (MBM29LV800TA = DAH and MBM29LV800BA = 5BH for ×8 mode; MBM29LV800TA = 22DAH and
MBM29LV800BA = 225BH for ×16 mode). These two bytes/words are given in the tables 4.1 and 4.2. All identifiers
for manufactures and device will exhibit odd parity with DQ7 defined as the parity bit. In order to read the proper
device codes when executing the autoselect, A1 must be VIL. (See Tables 4.1 and 4.2.)
Table 4 .1 MBM29LV800TA/800BA Sector Protection Verify Autoselect Codes
Type
A12 to A18
A6
A1
A0
A-1*1 Code (HEX)
Manufacture’s Code
X
VIL
VIL
VIL
VIL
04H
Byte
MBM29LV800TA
X
Word
Device Code
Byte
MBM29LV800BA
X
Word
VIL
DAH
VIL
VIL
VIH
X
22DAH
VIL
5BH
VIL
VIL
VIH
X
225BH
Sector Protection
Sector
Addresses
VIL
VIH
VIL
VIL
01H*2
*1: A-1 is for Byte mode.
*2: Outputs 01H at protected sector addresses and outputs 00H at unprotected sector addresses.
Table 4 .2 Expanded Autoselect Code Table
Type
Code DQ15 DQ14 DQ13 DQ12 DQ11 DQ10 DQ9 DQ8 DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0
Manufacturer’s Code
04H A-1/0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
(B) DAH A-1 HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z 1 1 0 1 1 0 1 0
MBM29LV800TA
Device
(W) 22DAH 0 0 1 0 0 0 1 0 1 1 0 1 1 0 1 0
Code
(B) 5BH A-1 HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z 0 1 0 1 1 0 1 1
MBM29LV800BA
(W) 225BH 0 0 1 0 0 0 1 0 0 1 0 1 1 0 1 1
Sector Protection
01H A-1/0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
(B): Byte mode
(W): Word mode
12
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