
CHAPTER 2 PIN FUNCTIONS
User’s Manual U12768EJ4V1UD
42
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Pin Name
I/O
PULL
Function
Alternate Function
SCK1
P15/ASCK0
SCK2
I/O
Yes
Serial clock I/O (3-wire type) for CSI0 to CSI2
P22
SCL
Note 1
I/O
Yes
Serial clock I/O for I
2C
P12/SCK0
SDA
Note 1
I/O
Yes
Serial transmit/receive data I/O for I
2C
P10/SI0
SI0
P10/SDA
Note 1
SI1
P13/RXD0
SI2
Input
Yes
Serial receive data input (3-wire type) for CSI0 to CSI2
P20
SO0
P11
SO1
P14/TXD0
SO2
Output
Yes
Serial transmit data output (3-wire type) for CSI0 to CSI2
P21
TI00
External count clock input for TM0/external capture trigger input
P30
TI01
External capture trigger input for TM0
P31
TI10
External count clock input for TM1/external capture trigger input
P32
TI11
External capture trigger input for TM1
P33
TI2
External count clock input for TM2
P26/TO2
TI3
External count clock input for TM3
P27/TO3
TI4
External count clock input for TM4
P36/TO4/A15
TI5
Input
Yes
External count clock input for TM5
P37/TO5
TO0, TO1
Pulse signal output for TM0, TM1
P34/A13, P35/A14
TO2
Pulse signal output for TM2
P26/TI2
TO3
Pulse signal output for TM3
P27/TI3
TO4
Pulse signal output for TM4
P36/TI4/A15
TO5
Output
Yes
Pulse signal output for TM5
P37/TI5
TXD0
P14/SO1
TXD1
Output
Yes
Serial transmit data output for UART0 and UART1
P24
UBEN
Output
No
Higher byte enable signal output for external data bus
P91
VDD
—
Positive power supply pin
—
VPP
Note 2
—
High-voltage application pin for program write/verify
—
VSS
—
Ground potential
—
WAIT
Input
Yes
Control signal input for inserting wait in bus cycle
P120
WRH
Higher byte write strobe signal output for external data bus
P92/R/W
WRL
Output
No
Lower byte write strobe signal output for external data bus
P90/LBEN
X1
Input
—
X2
—
No
Resonator connection for main clock
—
XT1
Input
P114
XT2
—
No
Resonator connection for subclock
—
IC
Note 3
—
Internally connected
—
Notes 1.
PD703014AY, 703014BY, 703015AY, 703015BY, 703017AY, 70F3015BY, and 70F3017AY only
2.
PD70F3015B, 70F3015BY, 70F3017A, and 70F3017AY only
3.
PD703014A, 703014AY, 703014B, 703014BY, 703015A, 703015AY, 703015B, 703015BY, 703017A,
and 703017AY only
Remark
PULL: On-chip pull-up resistor