Pin Functions - Hitachi H8S/2678 Series Reference Manual

Bits 7 to 0—CS7 to CS0 Enable (CS7E to CS0E): These bits enable or disable the
corresponding CSn output.
Bit n
CSnE Description
Pin is designated as I/O port and does not function as CSn output pin
0
Pin is designated as CSn output pin
1
Port Function Control Register 2 (PFCR2)
Bit 7
—
Initial value 0
Read/Write —
PFCR2 is an 8-bit readable/writable register that performs I/O port control. PFCR2 is initialized to
H'0E by a reset and in hardware standby mode. It retains its prior state in software standby mode.
Bits 7 to 4—Reserved: These bits are always read as 0, and should only be written with 0.
Bit 1—OE Output Select (OES): Selects the OE output pin port when the OEE bit is set to 1 in
DRAMCR (enabling OE output).
Bit 1
OES Description
P35 is designated as OE output pin
0
PH5 is designated as OE output pin
1
5.17.3

Pin Functions

Port H pins also function as bus control signal output pins (CS7 to CS4 and OE) and interrupt
signal input pins (IRQ7 and IRQ6). Port H pin functions are shown in table 5.37.
290
6 5
— —
0 0
— —
4 3
— ASOE LWROE
0 1
— R/W
(Initial value)
(n = 7 to 0)
2 1
OES DMACS
1 1
R/W R/W
(Initial value)
0
0
R/W