278
Bit 2—LWR Output Enable (LWROE): Enables or disables
LWR
output.
Bit 2
LWROE
Description
0
PF3 is designated as I/O port and does not function as
LWR
output pin
1
PF3 is designated as
LWR
output pin
(Initial value)
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
0
P35 is designated as
OE
output pin
1
PH3 is designated as
OE
output pin
(Initial value)
Bit 0—DMAC Control Pin Select (DMACS): Selects the DMAC control I/O port.
Bit 0
DMACS
Description
0
P65 to P60 are designated as DMAC control pins
(Initial value)
1
P75 to P70 are designated as DMAC control pins
5.15.3
Pin Functions
Port F pins also function as interrupt input pins (
IRQ14
and
IRQ15
), bus control signal
input/output pins (
AS
,
RD
,
HWR
,
LWR
,
LCAS
,
UCAS
, and
WAIT
), and the system clock (ø)
output pin. Port F pin functions are shown in table 5.33.
Содержание H8S/2670
Страница 5: ......
Страница 9: ......
Страница 199: ...182 ...
Страница 361: ...344 ...
Страница 393: ...376 ...
Страница 647: ...630 ...