ELANSC310 AMD [Advanced Micro Devices], ELANSC310 Datasheet - Page 61

• Manufacturer Part Number: ELANSC310
• Description: Single-Chip, 32-Bit, PC/AT Microcontroller
• Manufacturer: AMD [Advanced Micro Devices]

ALTERNATE PIN FUNCTIONS SELECTED VIA FIRMWARE
The following tables contain brief descriptions of the alternate pin functions/names and the pin names of the default
function that the alternate function replaces. These alternate functions are selected via system firmware only.
SRAM Interface
This alternate function is configured by setting bit 0 of the Miscellaneous 6 Register, Index 70h.
Unidirectional/Bidirectional Parallel Port
This alternate function is configured via selecting either the Normal Bidirectional mode configuration or the EPP
mode configuration for the parallel port in the Function Enable 1 Register, Index B0h.
X1OUT [BAUD_OUT] Clock Source
The internal clock source driving out on this pin is configured via register bits of the Function Enable Registers,
Indexes B0h and B1h.
Notes:
The default function of this pin is that no clock is driven out and the pin is tri-stated.
[SRCS0]
[SRCS1]
[SRCS2]
[SRCS3]
Bidirectional Pin
[PPDCS]
[BAUD_OUT]
SRAM Pin Name
BAUD_OUT Pin Name
Name
Pin Type
Pin Type
O
O
O
O
O
Pin Type
Table 29. Bidirectional Parallel Port Pin Description
Parallel Port data register address decode
SRAM Bank 0 Chip Select. Low Byte
SRAM Bank 0 Chip Select. High Byte
SRAM Bank 1 Chip Select. Low Byte
SRAM Bank 1 Chip Select. High Byte
Table 30. X1OUT Clock Source Pin Description
O
Élan™SC310 Microcontroller Data Sheet
Serial baud rate clock
Bidirectional Parallel Port Pin
SRAM Interface Pin
Description/Notes
Table 28. SRAM Interface
P R E L I M I N A R Y
Description/Notes
X1OUT [BAUD_OUT] Pin
Description/Notes
CAS0L
CAS0H
CAS1L
CAS1H
Name/Function
Default Pin
X1OUT
PPDWE
Name/Function
Name/Function
Default Pin
Default Pin
Pin No.
Pin No.
Pin No.
200
90
6
7
4
5
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