Port F; Overview - Renesas H8S Series Hardware Manual

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.
Port F
Note: * Modes 6 and 7 are provided in the on-chip ROM version only.
Port F pins
PF /ø
7
PF /AS
6
PF /RD
5
PF /HWR
4
PF /LWR
3
PF /LCAS/WAIT /BREQO
2
PF /BACK
1
PF /BREQ
0
Figure 9-25 Port F Pin Functions
Pin functions in mode 7*
PF (input)/ ø (output)
7
PF (I/O)
6
PF (I/O)
5
PF (I/O)
4
PF (I/O)
3
PF (I/O)
2
PF (I/O)
1
PF (I/O)
0
Pin functions in modes 4 to 6*
PF (input) / ø (output)
7
AS (output)
RD (output)
HWR (output)
LWR (output)
PF (I/O)/ LCAS (output) / WAIT (input) / BREQO (output)
2
PF (I/O)/ BACK (output)
1
PF (I/O)/ BREQ (input)
0
Rev.6.00 Oct.28.2004 page 327 of 1016
REJ09B0138-0600H