
Rev. 2.0, 09/02, page 10 of 732
Type
Symbol
I/O
Name
Function
TXD3 to
TXD0
Output
Transmitted
data
Data output pins.
RXD3 to
RXD0
Input
Received data Data input pins.
Serial
communication
interface (SCI)
SCK3 to
SCK0
Input/
Output
Serial clock
Clock input/output pins.
SCL0
Input/
Output
I
input/ output
2
C clock
I
a bus.
Output a clock in the NMOS open-drain
method.
2
C bus clock input/output pins, which drive
I
interface
(option)
2
C bus
SDA0
Input/
Output
I
input/ output
2
C data
I
a bus.
Output data in the NMOS open-drain
method.
2
C bus data input/output pins, which drive
Output control
for MTU
POE3
to
POE0
Input
Port output
control
Input pins for the signal to request the
output pins of MTU waveforms to become
high impedance state.
AN7 to AN0 Input
Analog input
pins
Analog input pins.
ADTRG
Input
Input of trigger
for A/D
conversion
Pin for input of an external trigger to start
A/D conversion
AVref
(SH7145
only)
Input
Analog
reference
power supply
Analog reference power supply pin, (In
SH7144, this pin is internally connected to
the AVcc pin).
AV
CC
Input
Analog power
supply
Power supply pin for the A/D converter.
When the A/D converter is not used,
connect this pin to the system power
supply (+3.3 V).
A/D
converter
AV
SS
Input
Analog ground The ground pin for the A/D converter.
Connect this pin to the system power
supply (0 V).
SH7144
PA15 to PA0
SH7145
PA23 to PA0
Input/
Output
General
purpose port
SH7144: 16-bit general purpose
input/output pins.
SH7145: 24-bit general purpose
input/output pins.
PB9 to PB0
Input/
Output
General
purpose port
10-bit general purpose input/output pins.
I/O port
PC15 to
PC0
Input/
Output
General
purpose port
16-bit general purpose input/output pins.