Hitachi H8S/2678 Series Reference Manual page 202

Port Description
Port 2 • 8-bit I/O
port
• Schmitt-
trigger
input
Port 3 • 6-bit I/O
port
• Open-drain
output
capability
Port 4 • 8-bit I/O
port
Pins
P25/PO5/TIOCB4/
IRQ13
P24/PO4/TIOCA4/
IRQ12
P23/PO3/TIOCD3/
IRQ11
P22/PO2/TIOCC3/
IRQ10
P21/PO1/TIOCB3/
IRQ9
P20/PO0/TIOCA3/
IRQ8
P35/SCK1/OE
P34/SCK0
P33/RxD1
P32/RxD0/IrRxD
P31/TxD1
P30/TxD0/IrTxD
P47/AN7/DA1
P46/AN6/DA0
P45/AN5
P44/AN4
P43/AN3
P42/AN2
P41/AN1
P40/AN0
Modes Mode
1, 2, 5, 6
6-bit I/O port also functioning as TPU I/O pins (TIOCA3, TIOCB3,
TIOCC3, TIOCD3, TIOCA4, TIOCB4), interrupt input pins (IRQ13
to IRQ8), and PPG output pins (PO5 to PO0)
• When OEE = 1 and OES =0:
OE output
• Otherwise (after reset): I/O
port also functioning as SCI
(channel 1) I/O pin (SCK1)
5-bit I/O port also functioning as SCI (channels 0 and 1) I/O pins
(SCK0, RxD1, RxD0/IrRxD, TxD1, TxD0/IrTxD)
8-bit input port also functioning as A/D converter analog inputs
(AN7 to AN0) and D/A converter analog outputs (DA1, DA0)
4
• When EXPE = 0 (after reset):
I/O port also functioning as
SCI (channel 1) I/O pin
(SCK1)
• When EXPE = 1: OE output
when OEE = 1 and OES =0
• Otherwise: I/O port also
functioning as SCI (channel 1)
I/O pin (SCK1)
Mode
7
185