Hitachi H8S/2670, Справочное руководство

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188
Port Description Pins
Modes
1, 2, 5, 6
Mode
4
Mode
7
Port D
•
8-bit I/O
port
•
Built-in
MOS input
pull-up
PD7/D15–PD0/D8 Data bus input/output When EXPE = 0 (after reset):
I/O port
When EXPE = 1: Data bus
input/output
Port E
•
8-bit I/O
port
•
Built-in
MOS input
pull-up
PE7/D7–PE0/D0 In 8-bit bus mode: I/O port
In 16-bit bus mode: Data bus
input/output
When EXPE = 0 (after reset):
I/O port
When EXPE = 1 in 8-bit bus
mode: I/O port
When EXPE = 1 in 16-bit bus
mode: Data bus input/output
Port F
•
8-bit I/O
port PF7/ø When DDR = 1 (after reset): ø
output
When DDR = 0: Input port
When DDR = 0: Input port (after
reset)
When DDR = 1: ø output
PF6/
AS
When ASOE = 1 (after reset):
AS
output
When ASOE = 0: I/O port
When EXPE = 0 (after reset), or
when EXPE = 1 and ASOE = 0:
I/O port
When EXPE = 1 and ASOE = 1:
AS
output
PF5/
RD
PF4/
HWR
RD
,
HWR
output When EXPE = 0 (after reset):
I/O port
When EXPE = 1:
RD
,
HWR
output
PF3/
LWR
When LWROE = 1 (after reset):
LWR
output
When LWROE = 0: I/O port
When EXPE = 0 (after reset), or
when EXPE = 1 and LWROE =
0: I/O port
When EXPE = 1 and LWROE =
1:
LWR
output
PF2/
LCAS
/
IRQ15
When areas 2 to 5 are all
normal space (after reset), or
when DRAM space areas are
all in 8-bit bus mode: I/O port
also functioning as
IRQ15
interrupt input
When any DRAM space is in
16-bit bus mode: Dual function
as
IRQ15
interrupt input and
LCAS
output
When EXPE = 0 (after reset), or
when EXPE = 1 and areas 2 to
5 are all normal space, or when
EXPE = 1 and DRAM space
areas are all in 8-bit bus mode:
I/O port also functioning as
IRQ15
interrupt input
When EXPE = 1 and any
DRAM space is in 16-bit bus
mode: Dual function as
IRQ15
interrupt input and
LCAS
output