User’s Manual U12688EJ4V0UM00
39
CHAPTER 2 PIN FUNCTIONS
The names and functions of this product’s pins are listed below. These pins can be divided into port pins and non-
port pins according to their functions.
2.1
List of Pin Functions
(1) Port pins (1/4)
Pin Name
I/O
Function
Alternate Function
P00
TO100
P01
TO101
P02
TCLR10
P03
TI10
P04
INTP100/DMARQ0
P05
INTP101/DMARQ1
P06
INTP102/DMARQ2
P07
I/O
Port 0
8-bit input/output port
Input/output mode can be specified in 1-bit units.
INTP103/DMARQ3
P10
TO110
P11
TO111
P12
TCLR11
P13
TI11
P14
INTP110/DMAAK0
P15
INTP111/DMAAK1
P16
INTP112/DMAAK2
P17
I/O
Port 1
8-bit input/output port
Input/output mode can be specified in 1-bit units.
INTP113/DMAAK3
P20
Input
NMI
P21
P22
TXD0/SO0
P23
RXD0/SI0
P24
SCK0
P25
TXD1/SO1
P26
RXD1/SI1
P27
I/O
Port 2
P20 is an input-only port.
If a valid edge is input, it operates as an NMI input. Also, the
status of the NMI input is shown by bit 0 of the P2 register.
P21 to P27 are 7-bit input/output ports.
Input/output mode can be specified in 1-bit units.
SCK1
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