Bus operations
M29W128FH, M29W128FL
3.6.5 Temporary Unprotect of high voltage Protected Blocks
The RP pin can be used to temporarily unprotect all the blocks previously protected using the In-System
or the Programmer protection technique (High Voltage techniques).
Refer to Section 2.9: Reset/Block Temporary Unprotect (RP).
Table 2. Bus operations, 8-bit mode
Operation(1)
Address Inputs
E G W RP VPP/WP
A22-A0, DQ15A-1
Data Inputs/Outputs
DQ14-DQ8
DQ7-DQ0
Bus Read
VIL VIL VIH VIH
VIH
Bus Write
VIL VIH VIL VIH
VIH
Output Disable
X VIH VIH VIH
VIH
Standby
VIH X X VIH
VIH
1. X = VIL or VIH.
Cell Address
Command Address
X
X
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Data Output
Data Input
Hi-Z
Hi-Z
Table 3. Read Electronic Signature, 8-bit mode
Read
Cycle(1)
Address Inputs
Data Inputs/Outputs
E
G
W
A22-A10 A9 A8-A7 A6 A5-A4 A3
A2
A1
A0
DQ15A-1
DQ14-
DQ8
DQ7-DQ0
Manufacturer
Code
VIL VIL VIL VIL
X
Device Code
(Cycle 1)
VIL VIL VIL VIH
X
Device Code VIL VIL VIH
X
VID X VIL X
(Cycle 2)
VIH VIH VIH VIL
X
Device Code
(Cycle 3)
VIH VIH VIH VIH
X
Hi-Z
20h
Hi-Z 7Eh (Both Devices)
Hi-Z 12h (Both Devices)
8Ah (M29W128FH)
Hi-Z
8Bh (M29W128FL)
1. X = VIL or VIH.
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