M29DW128F datasheet(21/94 Pages) STMICROELECTRONICS

21 / 94 page

M29DW128F

Bus operations

21/94

Table 6.

Bus operations, 16-bit mode(1)

Operation

VPP/

Address Inputs

Data Inputs/Outputs

A22-A0

DQ15A-1, DQ14-DQ0

Bus Read

VIL

VIH

Cell Address

Data Output

Bus Write

VIL

VIH

VIL

VIH

Command Address

Data Input

Output Disable

VIH

XHi-Z

Standby

VIH

XHi-Z

X = VIL or VIH.

Table 7.

Read Electronic Signature, 16-bit mode(1)

Read Cycle

Address Inputs

Data Inputs/Outputs

A22-

A10

A7-

A5-

DQ15A-1, DQ14-DQ0

Manufacturer Code

VIL

VIH

XVID

XVIL

VIL

0020h

Device Code (Cycle 1)

VIL

VIH

227Eh

Device Code (Cycle 2)

VIH

VIL

2220h

Device Code (Cycle 3)

VIH

2200h

X = VIL or VIH.

Table 8.

Block Protection, 16-bit mode(1)

Operation

VPP/

Address Inputs

Data Inputs/Outputs

A22-

A12

A11-

A10

A5-

A3-

DQ15A-1, DQ14-DQ0

Verify Extended

Block Indicator

(bits DQ6, DQ7)

VIL VIL VIH VIH

VIH

XVID

VIL

VIL VIH

VIH

0080h

(Customer Lockable)

00C0h

(Customer Locked)(2)

Verify Block

Protection Status

BKA

VIL

0001h (protected)

0000h (unprotected)

Temporary Block

Unprotect (3)

VID

Valid

Data Input

X = VIL or VIH. BKA Bank Address, BA Any Address in the Block.

This indicates the protection status of the second section of the Extended Block; the first section of the Extended Block

being always Factory Locked.

The RP pin unprotects all the blocks that have been previously protected using a High Voltage protection Technique.

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