Intel

R

Datasheet

3

Contents

1.

Architectural Overview ................................................................................................................. 9

1.1.

Interface Overview........................................................................................................... 9

1.1.1.

Intel Firmware Hub Interface....................................................................... 10

1.1.2.

Address/Address-Multiplexed Interface ...................................................... 10

1.2.

Nonvolatile Flash Memory Core .................................................................................... 10

2.

Pinout Configurations................................................................................................................. 13

2.1.

Pin Descriptions............................................................................................................. 14

3.

Interface Operation Description .................................................................................................17

3.1.

Read

17

3.2.

Write

17

3.3.

Output Disable............................................................................................................... 17

3.4.

Reset

17

3.5.

Operational Effects of Hardware Write-Protect Pins TBL# and WP# ........................... 18

4.

Functional Descriptions.............................................................................................................. 19

4.1.

Read Array Command................................................................................................... 21

4.2.

Read Identifier Codes Command.................................................................................. 21

4.3.

Read Status Register Command................................................................................... 21

4.4.

Clear Status Register Command................................................................................... 21

4.5.

Block Erase Command ................................................................................................. 22

4.6.

Program Command....................................................................................................... 22

4.7.

Block Erase Suspend Command .................................................................................. 23

4.8.

Program Suspend Comand........................................................................................... 23

4.9.

Register Based Locking, General-Purpose Input, and Random Number Generator

Registers

23

4.9.1.

T_BLOCK_LK and T_MINUSxx_LK — Block-Locking Registers ............... 25

4.9.2.

General-Purpose Input Register ................................................................. 26

4.9.2.1.

GPI_REG — General-Purpose Input Register ............................... 26

4.9.3.

Random Number Generator Registers ....................................................... 27

4.9.3.1.

RNG Hardware Status Register ..................................................... 27

4.9.3.2.

RNG Data Status Register ............................................................. 27

4.9.3.3.

RNG Data Register......................................................................... 28

4.10.

Using the Random Number Generator ......................................................................... 28

4.11.

Detecting and Initializing the RNG Device..................................................................... 28

4.11.1.

Detecting the RNG Device .......................................................................... 28

4.11.2.

Initializing the RNG Device.......................................................................... 29

4.11.3.

Selecting Appropriate FWH IDs and Densities ........................................... 29

4.11.4.

Mapping FWH Devices onto Memory Map ................................................. 30

4.11.5.

Paging FWH Devices for Greater Than 4 MB of FWH Memory ................. 30

4.11.6.

Programming Multiple FWH Devices.......................................................... 30

4.12.

CUI Automation Flowcharts........................................................................................... 31

5.

Electrical Specifications ............................................................................................................. 33

5.1.

Absolute Maximum Ratings........................................................................................... 33