Rev.6.00 Oct.28.2004 page 327
of 1016
REJ09B0138-0600H
9.13
Port F
9.13.1
Overview
Port F is an 8-bit I/O port. Port F pins also function as bus control signal input/output pins (
AS
,
RD
,
HWR
,
LWR
,
LCAS
,
WAIT
,
BREQO
,
BREQ
, and
BACK
) and the system clock (ø) output pin.
Figure 9-25 shows the port F pin configuration.
PF
7
/ ø
PF
6
/ AS
PF
5
/ RD
PF
4
/ HWR
PF
3
/ LWR
PF
2
/ LCAS/ WAIT / BREQO
PF
1
/ BACK
PF
0
/ BREQ
Port F
Port F pins
PF
7
PF
6
PF
5
PF
4
PF
3
PF
2
PF
1
PF
0
Note:
*
Modes 6 and 7 are provided in the on-chip ROM version only.
(input)/
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
(I/O)
Pin functions in mode 7
*
ø (output)
PF
7
AS
RD
HWR
LWR
PF
2
PF
1
PF
0
(input) /
(output)
(output)
(output)
(output)
(I/O)/ LCAS
(I/O)/ BACK (output)
(I/O)/ BREQ
Pin functions in modes 4 to 6
*
(output) / WAIT (input) / BREQO (output)
(input)
ø (output)
Figure 9-25 Port F Pin Functions
Summary of Contents for ZTAT H8S/2357F
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