Datasheet

78K0/Ix2 CHAPTER 2 PIN FUNCTIONS
R01UH0010EJ0500 Rev.5.00 28
Feb 28, 2012
2.2 Description of Pin Functions
Remark The pins mounted depend on the product. Refer to 1.3 Pin Configuration (Top View) and 2.1 Pin
Function List.
2.2.1 P00 to P02 (port 0)
P00 to P02 function as an I/O port. These pins also function as timer I/O, external interrupt request input, and chip
select input.
78K0/IY2 78K0/IA2 78K0/IB2
16 Pins 20 Pins 30 Pins 32 Pins

P00/TI000/INTP0/TOH1
/TI51
P00/TI000/INTP0
P00/TI000/INTP0/TOH1/
TI51
 
P01/TO00/TI010

 
P02/SSI11/INTP5 P02/SSI11/INTP5
Remark Functions in angle brackets < > can be assigned by setting the input switch control register (MUXSEL).
The following operation modes can be specified in 1-bit units.
(1) Port mode
P00 to P02 function as an I/O port. P00 to P02 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 (PU0).
(2) Control mode
P00 to P02 function as timer I/O, external interrupt request input, and chip select input.
(a) TI000
This is a pin for inputting an external count clock to 16-bit timer/event counter 00 and is also for inputting a
capture trigger signal to the capture registers (CR000, CR010) of 16-bit timer/event counter 00.
(b) TI010
This is a pin for inputting a capture trigger signal to the capture register (CR000) of 16-bit timer/event counter 00.
(c) TI51
This is a pin for inputting an external count clock to 8-bit timer/event counter 51.
(d) TO00
This is a timer output pin of 16-bit timer/event counter 00.
(e) TOH1
This is a timer output pin of 8-bit timer H1
(f) INTP0, INTP5
These are external interrupt request input pins for which the valid edge (rising edge, falling edge, or both rising
and falling edges) can be specified.