Datasheet

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