Filter
Top Products
466
Chapter 30 I/O Ports
3.Port Register Settings
■ P08: The functions of Port 08 are controlled by PFR08
If the external bus interface is enabled (by mode pins MD[2:0] or mode vector), P08[7:0] is input/output for
external bus control signals RDY, BRQ, BGRNTX, RDX, WRX[3:0]. Otherwise, the port can be used as general
purpose port.
PFR08.7 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port):
External bus function is RDY
PFR08.6 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port):
External bus function is BRQ
PFR08.5 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port):
External bus function is BGRNTX
PFR08.4 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port):
External bus function is RDX
PFR08.3 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port):
External bus function is WRX3
PFR08.2 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port):
External bus function is WRX2
PFR08.1 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port):
External bus function is WRX1
PFR08.0 0 - Port is in general purpose port mode.
1 - Port is in external bus mode (if external bus is enabled otherwise general purpose port):
External bus function is WRX0
Addr 7 6 5 4 3 2 1 0 initial
PFR08 0D88h PFR08.7 PFR08.6 PFR08.5 PFR08.4 PFR08.3 PFR08.2 PFR08.1 PFR08.0 1111 1111
EPFR08 0DC8h - - - - - - - - ---- ----
R/W R/W R/W R/W R/W R/W R/W R/W