82802AB datasheet(19/53 Pages) INTEL

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Intel

® 82802AB/AC Firmware Hub

Datasheet

Functional Descriptions

When the VPP voltage

≤ VPPLK, read operations from the status register, identifier codes or memory are

enabled, but programming and erase functions are disabled. Placing VPPH1/2 on VPP enables successful

block erase and program operations.

Table 2.

Command Definitions

First Bus Cycle

Second Bus Cycle

Command

Bus Cycles

Required

Notes

Oper.

Addr.(1)

Data(2)

Oper.

Addr.(1)

Data(2)

Read Array/Reset

Write

FFh

Read Identifier Codes

≥ 2

Write

90h

Read

Read Status Register

Write

70h

Read

SRD

Clear Status Register

Write

50h

Block Erase

Write

20h

Write

D0h

Program

3,4

Write

40h

10h

Write

Block Erase and Program

Suspend

Write

B0h

Block Erase and Program

Resume

Write

D0h

Note:

1. Key:

= Any valid address within the device

= Identifier Code Address

= Address within the block being erased

= Address of memory location to be written

SRD

= Data read from status register.

= Data to be written at location WA

= Data read from identifier codes

2. Following the Read Identifier Codes command, read operations access manufacturer and device.

See Table 4 for the read identifier code data.

3. The block must not be write locked when attempting block erase or program operations. Attempts

to issue a block erase or program to a write-locked block will fail.

4. Either 40h or 10h are recognized by the WSM as the program setup.

Note: Commands other than those shown previously are reserved by Intel for future device implementations

and should not be used.

82802AB Datasheet(PDF) 19 Page - Intel Corporation

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