HD6432351 datasheet(433/1025 Pages) RENESAS

433 / 1025 page

Section 9 I/O Ports

Rev. 3.00 Sep 15, 2006 page 399 of 988

REJ09B0330-0300

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 (φ) output

pin.

Figure 9.25 shows the port F pin configuration.

PF7/φ

PF6/AS

PF5/RD

PF4/HWR

PF3/LWR

PF2/LCAS/WAIT/BREQO

PF1/BACK

PF0/BREQ

Port F

PF7

HWR

LWR

PF2

PF1

PF0

(input) /

(output)

(I/O)/

Port F pins

Pin functions in modes 1 and 2*

PF7

PF6

PF5

PF4

PF3

PF2

PF1

PF0

Note: * Modes 2, 3, 6, and 7 only apply to the H8S/2351.

(input)/

(I/O)

Pin functions in modes 3 and 7*

WAIT

BACK

BREQ

(input)

(output)

(input)

BREQO

φ (output)

(output)

PF7

HWR

LWR

PF2

PF1

PF0

(input) /

(output)

(I/O)/

LCAS

(I/O)/

BACK (output)

(I/O)/

BREQ

Pin functions in modes 4 to 6*

(output) /

WAIT (input) / BREQO (output)

(input)

φ (output)

Figure 9.25 Port F Pin Functions

HD6432351 Datasheet(PDF) 433 Page - Renesas Technology Corp

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