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Chapter 30 I/O Ports
3.Port Register Settings
■ P09: The functions of Port 09 are controlled by PFR09
If the external bus interface is enabled (by mode pins MD[2:0] or mode vector), P09[7:0] is input/output for
external bus control signals CSX[7:0]. Otherwise, the port can be used as general purpose port.
PFR09.7 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR09.6 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR09.5 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR09.4 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR09.3 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR09.2 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR09.1 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port).
PFR09.0 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
PFR09 0D89h PFR09.7 PFR09.6 PFR09.5 PFR09.4 PFR09.3 PFR09.2 PFR09.1 PFR09.0 1111 1111
EPFR09 0DC9h - - - - - - - - ---- ----
R/W R/W R/W R/W R/W R/W R/W R/W