Preliminary User’s Manual U16846EJ1V0UD
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CHAPTER 4 PORT FUNCTIONS
4.1 Port Functions
There are two types of pin I/O buffer power supplies: AV
REF
and V
DD
. 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
AV
REF
P20 to P23
V
DD
Pins other than P20 to P23
78K0/KB1+ products are provided with the ports shown in Figure 4-1, which enable variety of control operations.
The functions of each port are shown in Table 4-2.
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.
Figure 4-1. Port Types
P30
Port 3
P33
P23
Port 12
P120
Port 2
P00
Port 0
P03
P10
Port 1
P17
P20
Port 13
P130
