D12320VF25V Datasheet, PDF (317/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

8.11 Port F
Section 8 I/O Ports
8.11.1 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, WAIT, BREQ, BACK, BREQO, CS4, and CS5), the system clock (φ) output
pin and interrupt input pins (IRQ0 to IRQ3).
The interrupt input pins (IRQ0 to IRQ3) are Schmitt-triggered inputs.
Figure 8.23 shows the port F pin configuration.
Port F
Port F pins
Pin functions in modes 4 to 6*
PF7/ φ
PF7 (input)/φ (output)
PF6/ AS
PF6 (I/O)/AS (output)
PF5/ RD
RD (output)
PF4/ HWR
HWR (output)
PF3/ LWR/IRQ3
PF3 (I/O)/LWR (output)/IRQ3 (input)
PF2/ WAIT / IRQ2 / BREQO PF2 (I/O)/WAIT (input)/IRQ2 (input)/BREQO (output)
PF1/ BACK/IRQ1 / CS5
PF1 (I/O)/BACK (output)/IRQ1 (input)/CS5 (output)
PF0/ BREQ/IRQ0 / CS4
PF0 (I/O)/BREQ (input)/IRQ0 (input)/CS4 (output)
Pin functions in mode 7*
PF7 (input)/φ (output)
PF6 (I/O)
PF5 (I/O)
PF4 (I/O)
PF3 (I/O)/IRQ3 (input)
PF2 (I/O)/IRQ2 (input)
PF1 (I/O)/IRQ1 (input)
PF0 (I/O)/IRQ0 (input)
Note: * Modes 6 and 7 are not available in the ROMless versions.
Figure 8.23 Port F Pin Functions
Rev.7.00 Feb. 14, 2007 page 283 of 1108
REJ09B0089-0700