ÉlanSC310 Microcontroller Evaluation Board User’s Manual
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PGP1
This pin is used as an address decode for the IDE CS0. It should be programmed
as an address decode for I/O addresses 1F0H–1F7H. Setting the ÉlanSC310
microcontroller’s Index 91h to xxxx11xxb programs PGP1 as an address decode.
Setting ÉlanSC310 Index 9Ch to 3Eh sets the address range to 1F0h–1F7h. PGP1
must also be enabled as an output for the evaluation board. This is done by setting
Bit 2 of the ÉlanSC310 Index 74h.
NOTE:
This pin is referenced as PGPB on the evaluation board schematics
beginning in “Schematics” on page D-1.
PGP2
This pin is used as an address decode for the IDE CS1. It should be programmed
as an address decode for I/O addresses 3F0h–3F7h. Setting the ÉlanSC310 Index
91h to xx11xxxxb programs PGP2 as an address decode. Setting the ÉlanSC310
Index 94h to 7Eh sets the address range to 3F0h–3F7h.
NOTE:
This pin is referenced as PGPC on the evaluation board schematics
beginning in “Schematics” on page D-1.
PGP3
This pin has no specific function on the ÉlanSC310 microcontroller evaluation
board.
NOTE:
This pin is referenced as PGPD on the evaluation board schematics
beginning in “Schematics” on page D-1.
Power Management Control (PMC) Pins
The ÉlanSC310 microcontroller has five Power Management Control (PMC) pins
that can be programmed high or low based on the current power management mode.
The ÉlanSC310 microcontroller evaluation board makes use of the PMC pins as
follows.
evalbd.book : ch4 Page 3 Thursday, August 8, 1996 2:34 PM