P70 To P77 (Port 7) - NEC mPD780065 Series Preliminary User's Manual

2.2.7 P70 to P77 (Port 7)

This is an 8-bit input/output port. Besides serving as input/output ports, these pins function as the serial data input/
output, serial clock input/output, and clock output of the serial interface.
The following operating modes can be specified in 1-bit units.
(1) Port mode
These pins function as an 8-bit input/output port. They can be specified in 1-bit units as input or output ports
with port mode register 7 (PM7). On-chip pull-up resistors can be specified by defining pull-up resistor option
register 7 (PU7).
(2) Control mode
These pins function as serial data input/output, serial clock input/output, and clock output of the serial interface.
(a) SDIO30
The serial interface serial data input/output pin.
(b) SCK30
The serial interface serial clock input/output pin.
(c) RxD0, TxD0
The asynchronous serial interface serial data input/output pin.
(d) ASCK0
The asynchronous serial interface serial clock input pin.
(e) PCL
The clock output pin.
38
CHAPTER 2 PIN FUNCTION
Preliminary User's Manual U13420EJ2V0UM00