MBM29LV008TA-70/-90/-12/MBM29LV008BA-70/-90/-12
The manufacturer and device codes may also be read via the command register, for instances when the
MBM29LV008TA/BA are erased or programmed in a system without access to high voltage on the A9 pin. The
command sequence is illustrated in Table 6. (Refer to Autoselect Command section.)
Byte 0 (A0 = VIL) represents the manufacturer’s code (Fujitsu = 04H) and (A0 = VIH) represents the device identifier
code (MBM29LV008TA = 3EH and MBM29LV008BA = 37H). These two bytes/words are given in the tables 3.1
and 3.2. 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 3.1 and 3.2.)
Table 3 .1 MBM29LV008TA/008BA Sector Protection Verify Autoselect Codes
Type
A13 to A19
A10
VIL
VIL
VIL
A6
VIL
VIL
VIL
A1
VIL
VIL
VIL
A0
VIL
VIH
VIH
Code (HEX)
04H
Manufacture’s Code
X
X
X
MBM29LV008TA
MBM29LV008BA
3EH
Device Code
37H
Sector
Addresses
Sector Protection
VIL
VIL
VIH
VIL
01H*
* : Outputs 01H at protected sector addresses and outputs 00H at unprotected sector addresses.
Table 3 .2 Expanded Autoselect Code Table
Type
Code
04H
3EH
37H
01H
DQ7
0
DQ6
0
DQ5
0
DQ4
0
DQ3
0
DQ2
1
DQ1
0
DQ0
0
Manufacture’s Code
MBM29LV008TA
MBM29LV008BA
Sector Protection
0
0
1
1
1
1
1
0
Device Code
0
0
1
1
0
1
1
1
0
0
0
0
0
0
0
1
10
FUJITSU [ FUJITSU ]
