MBM29LV160TE/BE-70/90/12
The manufacturer and device codes may also be read via the command register, for instances when the
MBM29LV160TE/BE is erased or programmed in a system without access to high voltage on the A9 pin. The
command sequence is illustrated in Table 7, Command Definitions.
Byte 0 (A0 = VIL) represents the manufacture’s code and byte 1 (A0 = VIH) represents the device identifier code.
For the MBM29LV160TE/BE these two bytes are given in the Table 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 2 or 3.) For device indentification in word mode (BYTE =
VIH), DQ9 and DQ13 are equal to ‘1’ and DQ8, DQ10 to DQ12, DQ14, and DQ15 are equal to ‘0’.
If BYTE = VIL (for byte mode), the device code is C4H (for top boot block) or 49H (for bottom boot block). If BYTE
= VIH (for word mode), the device code is 22C4H (for top boot block) or 2249H (for bottom boot block).
In order to determine which sectors are write protected, A1 must be at VIH while running through the sector
addresses; if the selected sector is protected, a logical ‘1’ will be output on DQ0 (DQ0 =1).
Table 4.1 MBM29LV160TE/BE Sector Protection Verify Autoselect Code
Code
Type
Manufacture’s Code
A12 to A19
A6
A1
A0
A-1*1
(HEX)
X
VIL
VIL
VIL
VIL
VIL
X
04H
Byte
Word
Byte
C4H
MBM29LV160TE
MBM29LV160BE
X
X
VIL
VIL
VIH
22C4H
49H
Device Code
VIL
X
VIL
VIL
VIL
VIH
VIH
VIL
Word
2249H
Sector
Addresses
Sector Protection
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
Code DQ15 DQ14 DQ13 DQ12 DQ11 DQ10 DQ9 DQ8 DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0
Type
Manufacture’s Code
04H A-1/0
C4H A-1 HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z 1
(W) 22C4H
(B) 49H A-1 HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z HI-Z 0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
(B)
MBM29LV160TE
0
0
1
0
0
0
1
0
1
Device
Code
MBM29LV160BE
(W) 2249H
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
Sector Protection
01H A-1/0
(B): Byte mode
(W): Word mode
12
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