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User’s Manual U19780EJ2V0UD
79
CHAPTER 4 PORT FUNCTIONS
4.1 Port Functions
There are two types of pin I/O buffer power supplies: AV
DD
and V
DD
. The relationship between these power
supplies and the pins is shown below.
Table 4-1. Pin I/O Buffer Power Supplies
Corresponding Pins
Power Supply
78K0/KB2-A 78K0/KC2-A
AV
DD
P20 to P25, P80 to P83
P20 to P27, P80 to 83
V
DD
Pins other than P20 to P25,
P80 to P83
Pins other than P20 to P27,
P80 to 83
78K0/Kx2-A 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 and 4-3.
In addition to the function as digital I/O ports, these ports have several alternate functions. For details of the
alternate functions, see
CHAPTER 2 PIN FUNCTIONS
.