BRIGHT
Microelectronics
Inc.
Preliminary BM29F400T/BM29F400B
(1)
Table 2. Bus Operations (BYTE = VIL)
OPERATION
A0
A1
A6
A9
DQ0-DQ7
DQ8-DQ15
WE
CE
OE
RESET
(2)
Electronic ID Manufacturer
L
L
H
L
L
L
VID
VID
A9
X
Code
Code
DOUT
High Z
High Z
High Z
High Z
High Z
High Z
High Z
High Z
High Z
H
H
H
H
L
(2)
Electronic ID Device
L
L
H
X
L
L
L
X
L
H
H
X
X
H
L
H
A0
X
L
L
(3)
Read
L
A1
X
A6
X
Standby
X
X
H
H
L
High Z
High Z
Hardware Reset
Output Disable
Write
X
X
X
X
X
X
X
X
High Z
DIN(4)
H
H
H
VID
A0
L
A1
H
X
A6
L
A9
VID
X
(2)
Verify Sector Protect
H
X
Code
X
Temporary Sector Unprotect
X
X
X
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 is VIL, OE at VIH initiates the write operations.
CE
4. Refer to Table 6 for valid D during a write operation.
IN
Table 3. Sector Protection Verify Electronic ID Codes
TYPE
Manufacturer Code
29F400T
A17-A12
A6
VIL
VIL
A1
VIL
VIL
A0
VIL
VIH
Code (Hex)
ADH
X
X
Byte
Word
Byte
23H
29F400
22,23H
ABH
29F400B
X
VIL
VIL
VIH
VIL
Word
22 ABH
01H(1)
Sector Protection
Sector Address
VIL
VIH
Note: Outputs 01H at protected sector addresses, and outputs 00H at unprotected addresses.
A Winbond Company
Publication Release Date: May 1999
Revision A1
- 5 -
WINBOND [ WINBOND ]
