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Chapter 30 I/O Ports
3.Port Register Settings
■ P04: The functions of Port 04 are controlled by PFR04
If the external bus interface is enabled (by mode pins MD[2:0] or mode vector), P04[7:0] is input/output for
address lines A[31:24]. Otherwise, the port can be used as general purpose port.
PFR04.7 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR04.6 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR04.5 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR04.4 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR04.3 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR04.2 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR04.1 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR04.0 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
PFR04 0D84h PFR04.7 PFR04.6 PFR04.5 PFR04.4 PFR04.3 PFR04.2 PFR04.1 PFR04.0 1111 1111
EPFR04 0DC4h - - - - - - - - ---- ----
R/W R/W R/W R/W R/W R/W R/W R/W
