HD6432345 Datasheet, PDF (282/907 Pages) Hitachi Semiconductor – H8S/2345 F-ZTAT Hardware Manual

8.11 Port F
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, and BACK), the system clock (ø) 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
PF₇/ ø
PF₆/ AS
PF₅/ RD
PF₄/ HWR
PF₃/ LWR/IRQ3
PF₂/ WAIT / IRQ2
PF₁/ BACK/IRQ1
PF₀/ BREQ/IRQ0
Pin functions in modes 1, 2, 4, 5, and 6*
PF₇ (input)/ø(output)
AS (output)
RD (output)
HWR (output)
LWR (output)
PF₂ (I/O)/WAIT (input)/IRQ2 (input)
PF₁ (I/O)/BACK (output)/IRQ1 (input)
PF₀ (I/O)/BREQ (input)/IRQ0 (input)
Pin functions in modes 3 and 7*
PF₇ (input)/ø (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 1 to 3 are not available on the F-ZTAT version.
Modes 2, 3, 6, and 7 are not available on the ROMless version.
Figure 8.23 Port F Pin Functions
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