P10 To P17 (Port 1) - NEC 78K0 Series User Manual

2.2.2 P10 to P17 (port 1)

P10 to P17 function as an 8-bit I/O port. These pins also function as pins for external interrupt request input, serial
interface data I/O, clock I/O, and timer I/O.
The following operation modes can be specified in 1-bit units.
(1) Port mode
P10 to P17 function as an 8-bit I/O port. P10 to P17 can be set to input or output port in 1-bit units using port
mode register 1 (PM1). Use of an on-chip pull-up resistor can be specified by pull-up resistor option register 1
(PU1).
(2) Control mode
P10 to P17 function as external interrupt request input, serial interface data I/O, clock I/O, and timer I/O.
(a) SI10
This is a serial data input pin of serial interface CSI10.
(b) SO10
This is a serial data output pin of serial interface CSI10.
(c) SCK10
This is a serial clock I/O pin of serial interface CSI10.
(d) RxD0
This is a serial data input pin of serial interface UART0.
(e) RxD6
This is a serial data input pin of serial interface UART6.
(f) TxD0
This is a serial data output pin of serial interface UART0.
(g) TxD6
This is a serial data output pin of serial interface UART6.
(h) TI50
This is the pin for inputting an external count clock to 8-bit timer/event counter 50.
(i) TO50
This is a timer output pin of 8-it timer/event counter 50.
(j) TOH0, TOH1
These are the timer output pins of 8-bit timers H0 and H1.
(k) INTP5
This is an external interrupt request input pin for which the valid edge (rising edge, falling edge, or both rising
and falling edges) can be specified.
CHAPTER 2 PIN FUNCTIONS
Preliminary User's Manual U17260EJ3V1UD
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