Hitachi H8S/2670, Reference Manual

Page: 42 / 647

25
Pin No.
Type Symbol FP-144 I/O Name and Function
Watchdog timer
(WDT)
WDTOVF
37 Output Watchdog timer overflow: Counter
overflow signal output pin in watchdog
timer mode.
Serial communi-
cation interface
(SCI)/smart card TxD2, TxD1,
TxD0/IrTxD 107, 138,
139 Output Transmit data (channels 0, 1, 2): Data
output pins.
interface (SCI0
with IrDA function)
RxD2, RxD1,
RxD0/IrRxD 108, 135,
137 Input Receive data (channels 0, 1, 2): Data
input pins.
SCK2, SCK1,
SCK0 109, 133,
134 Input/
output Serial clock (channels 0, 1, 2): Clock
input/output pins.
A/D converter AN15 to
AN12,
AN7 to AN0 130 to 127,
126 to 123,
120 to 117 Input Analog 15 to 12, 7 to 0: Analog input
pins.
ADTRG
110 Input A/D conversion external trigger input:
Pin for input of an external trigger to
start A/D conversion.
D/A converter DA3, DA2,
DA1, DA0
130, 129,
126, 125 Output Analog output: D/A converter analog
output pins.
A/D converter,
D/A converter AVCC 122 Input The power supply pin for the A/D
converter and D/A converter.
When the A/D converter and D/A
converter are not used, this pin should
be connected to the system power
supply (+3 V).
AVSS 131 Input The ground pin for the A/D converter
and D/A converter.
This pin should be connected to the
system power supply (0 V).
Vref 121 Input The reference voltage input pin for the
A/D converter and D/A converter.
When the A/D converter and D/A
converter are not used, this pin should
be connected to the system power
supply (+3 V).