Description Of Pin Functions; P00 To P06 (Port 0) - NEC 78K0R/KE3 User Manual

16-bit single-chip microcontrollers

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2.2 Description of Pin Functions

P00 to P06 function as a 7-bit I/O port. These pins also function as timer I/O, serial interface data I/O, and clock

Input to the P03 and P04 pins can be specified through a normal input buffer or a TTL input buffer in 1-bit units,

using port input mode register 0 (PIM0).

Output from the P02 to P04 pins can be specified as normal CMOS output or N-ch open-drain output (V

tolerance) in 1-bit units, using port output mode register 0 (POM0).

The following operation modes can be specified in 1-bit units.

(1) Port mode

P00 to P06 function as a 7-bit I/O port. P00 to P06 can be set to input or output port in 1-bit units using port

mode register 0 (PM0). Use of an on-chip pull-up resistor can be specified by pull-up resistor option register 0

(2) Control mode

P00 to P06 function as timer I/O, serial interface data I/O, and clock I/O.

(a) TI00, TI05, TI06

Thess are the pins for inputting an external count clock/capture trigger to 16-bit timer 00, 05, and 06.

(b) TO00, TO05, TO06

These are the timer output pins of 16-bit timer 00, 05, and 06.

This is a serial data input pin of serial interface CSI10.

This is a serial data output pin of serial interface CSI10.

This is a serial clock I/O pin of serial interface CSI10.

This is a serial data output pin of serial interface UART1.

This is a serial data input pin of serial interface UART1.

This is a serial data I/O pin of serial interface for simplified I

CHAPTER 2 PIN FUNCTIONS

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