Datasheet

78K0/Ix2 CHAPTER 4 PORT FUNCTIONS
R01UH0010EJ0500 Rev.5.00 97
Feb 28, 2012
CHAPTER 4 PORT FUNCTIONS
4.1 Port Functions
There are two types of pin I/O buffer power supplies: AV
REF and VDD. The relationship between these power supplies
and the pins is shown below.
Table 4-1. Pin I/O Buffer Power Supplies
Power Supply Corresponding Pins
AVREF
P20 to P27, P70
Note
VDD
Pins other than P20 to P27, P70
Note
Note 78K0/IY2: P20, P21, P23 to P25
78K0/IA2: P20 to P25
78K0/IB2: P20 to P27, P70
78K0/Ix2 microcontrollers are provided with digital I/O ports, which enable variety of control operations. The functions
of each port are shown in Tables 4-2 to 4-5.
In addition to the function as digital I/O ports, these ports have several alternate functions. For details of the alternate
functions, refer to CHAPTER 2 PIN FUNCTIONS.