392
10.12
Port F
10.12.1
Overview
Port F is an 8-bit I/O port. Port F pins also function as external interrupt input pins (
IRQ2
and
IRQ3
), BUZZ output pin, A/D trigger input pin (
ADTRG
), bus control signal input/output pins
(
AS
,
RD
,
HWR
,
LWR
,
LCAS
,
WAIT
,
BREQO
,
BREQ
, and
BACK
) and the system clock (ø)
output pin.
Figure 10-22 shows the port F pin configuration.
PF7 / ø
PF6 /
AS
/
LCAS
PF5 /
RD
PF4 /
HWR
PF3 /
LWR
/
ADTRG
/
IRQ3
PF2 /
WAIT
/
BREQO
PF1 /
BACK
/ BUZZ
PF0 /
BREQ
/
IRQ2
Port F
Port F pins
PF7
PF6
PF5
PF4
PF3
PF2
PF1
PF0
(input) / ø (output)
(I/O)
(I/O)
(I/O)
(I/O) /
ADTRG
(input) /
IRQ3
(input)
(I/O)
(I/O) / BUZZ (output)
(I/O) /
IRQ2
(input)
Pin functions in mode 7
PF7 (input) / ø (output)
AS
(output) /
LCAS
(output)
RD
(output)
HWR
(output)
PF3 (I/O) /
LWR
(output) /
ADTRG
(input) /
IRQ3
(input)
PF2 (I/O) /
LCAS
(output) /
WAIT
(input) /
BREQO
(output)
PF1 (I/O) /
BACK
(output) / BUZZ (output)
PF0 (I/O) /
BREQ
(input) /
IRQ2
(input)
Pin functions in modes 4 to 6
Figure 10-22 Port F Pin Functions
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...