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82802AC Datasheet(PDF) 3 Page - Intel Corporation |
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82802AC Datasheet(HTML) 3 Page - Intel Corporation |
3 / 53 page Intel ® 82802AB/AC Firmware Hub 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 |
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