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Chapter 30 I/O Ports
3.Port Register Settings
■ P03: The functions of Port 03 are controlled by PFR03
If the external bus interface is enabled (by mode pins MD[2:0] or mode vector), P03[7:0] is input/output for data
lines D[7:0]. Otherwise, the port can be used as general purpose port.
PFR03.7 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR03.6 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR03.5 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR03.4 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR03.3 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR03.2 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR03.1 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR03.0 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
Addr 7 6 5 4 3 2 1 0 initial
PFR03 0D83h PFR03.7 PFR03.6 PFR03.5 PFR03.4 PFR03.3 PFR03.2 PFR03.1 PFR03.0 1111 1111
EPFR03 0DC3h - - - - - - - - ---- ----
R/W R/W R/W R/W R/W R/W R/W R/W