TABLE OF CONTENTS
Distinctive Characteristics ............................................................................................................ 1
Élan™SC400 and ÉlanSC410 Microcontrollers ...................................................................... 1
ÉlanSC400 Microcontroller Only ............................................................................................. 1
General Description ..................................................................................................................... 2
Block Diagram—ÉlanSC400 Microcontroller .............................................................................. 4
Block Diagram—ÉlanSC410 Microcontroller .............................................................................. 5
Logic Symbol—ÉlanSC400 Microcontroller ................................................................................. 6
Logic Symbol—ÉlanSC410 Microcontroller ................................................................................. 7
Related AMD Products .............................................................................................................. 12
E86™ Family Devices ........................................................................................................... 12
Related Documents ............................................................................................................... 12
Élan™SC400 Microcontroller Evaluation Board ................................................................... 13
Third-Party Development Support Products ...................................................................................13
Customer Service .................................................................................................................. 13
Architectural Overview ............................................................................................................... 13
Low-Voltage Am486 CPU Core ............................................................................................ 14
Power Management .............................................................................................................. 14
Clock Generation .................................................................................................................. 14
ROM/Flash Memory Interface ............................................................................................... 15
DRAM Controller ................................................................................................................... 15
Integrated Standard PC/AT Peripherals ................................................................................ 15
PC/AT Support Features ....................................................................................................... 16
Bidirectional Enhanced Parallel Port (EPP) .......................................................................... 16
Serial Port .............................................................................................................................. 17
Keyboard Interfaces .............................................................................................................. 17
Programmable General-Purpose Inputs and Outputs ........................................................... 17
Infrared Port for Wireless Communication ............................................................................ 17
Dual PC Card Controller (ÉlanSC400 Microcontroller Only) ................................................. 17
Graphics Controller for CGA-Compatible Text and Graphics (ÉlanSC400 Microcontroller Only) .. 17
JTAG Test Features .............................................................................................................. 18
System Interfaces ................................................................................................................. 18
System Considerations .............................................................................................................. 20
Connection Diagram—ÉlanSC400 and ÉlanSC410 Microcontrollers ........................................ 24
Pin Designations ........................................................................................................................ 25
Pin Naming ............................................................................................................................ 25
Pin Changes for the ÉlanSC410 Microcontroller ....................................................................... 25
Pin Designations (Pin Number)—ÉlanSC400 Microcontroller ................................................... 26
Pin Designations (Pin Name)—ÉlanSC400 Microcontroller ...................................................... 29
Pin Designations (Pin Number)—ÉlanSC410 Microcontroller ................................................... 33
Pin Designations (Pin Name)—ÉlanSC410 Microcontroller ...................................................... 36
Pin State Tables ........................................................................................................................ 40
Pin Characteristics ................................................................................................................ 40
Using the Pin State Tables .................................................................................................... 41
Signal Descriptions .................................................................................................................... 62
Multiplexed Pin Function Options .......................................................................................... 70
Using the Configuration Pins to Select Pin Functions............................................................ 74
Clocking ..................................................................................................................................... 76
Clock Generation .................................................................................................................. 76
Integrated Peripheral Clock Sources .................................................................................... 77
32-kHz Crystal Oscillator ....................................................................................................... 79
Loop Filters ........................................................................................................................... 79
Intermediate and Low-Speed PLLs ....................................................................................... 79
Graphics Dot Clock PLL (ÉlanSC400 Microcontroller Only) ................................................. 80
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Élan™SC400 and ÉlanSC410 Microcontrollers Data Sheet
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