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BRIGHT
Preliminary BM29F400T/BM29F400B
Microelectronics
Inc.
A Winbond Company
Publication Release Date: May 1999
- 5 -
Revision A1
Table 2. Bus Operations ( BYTE = VIL)(1)
OPERATION
CE
OE
WE
A0
A1
A6
A9
DQ0-DQ7
DQ8-DQ15
RESET
Electronic ID Manufacturer(2)
L
L
H
L
L
L
VID
Code
High Z
H
Electronic ID Device(2)
L
L
H
H
L
L
VID
Code
High Z
H
Read(3)
L
L
H
A0
A1
A6
A9
DOUT
High Z
H
Standby
H
X
X
X
X
X
X
High Z
High Z
H
Hardware Reset
X
X
X
X
X
X
X
High Z
High Z
L
Output Disable
L
H
H
X
X
X
X
High Z
High Z
H
Write
L
H
L
A0
A1
A6
A9
DIN(4)
High Z
H
Verify Sector Protect(2)
L
L
H
L
H
L
VID
Code
High Z
H
Temporary Sector Unprotect
X
X
X
X
X
X
X
X
High Z
VID
Notes:
1. L = VIL, H = VIH, X = Don't Care. See DC Characteristics for voltage levels.
2. Manufacturer and device codes may also be accessed via a command register sequence. Refer to Table 6.
3. WE can be VIL if CE is VIL, OE at VIH initiates the write operations.
4. Refer to Table 6 for valid DIN during a write operation.
Table 3. Sector Protection Verify Electronic ID Codes
TYPE
A17-A12
A6
A1
A0
Code (Hex)
Manufacturer Code
X
VIL
VIL
VIL
ADH
29F400T
Byte
X
VIL
VIL
VIH
23H
29F400
Word
22,23H
29F400B
Byte
X
VIL
VIL
VIH
ABH
Word
22 ABH
Sector Protection
Sector Address
VIL
VIH
VIL
01H(1)
Note: Outputs 01H at protected sector addresses, and outputs 00H at unprotected addresses.
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