Pin Functions - Renesas H8S Series Hardware Manual

16-bit single-chip microcomputer

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Pin Functions

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. The pin functions differ between modes 4 to 6, and mode 7. Port F pin

functions are shown in table 9-24.

Table 9-24 Port F Pin Functions

Rev.6.00 Oct.28.2004 page 330 of 1016

REJ09B0138-0600H

Selection Method and Pin Functions

The pin function is switched as shown below according to bit PF7DDR.

Pin function

The pin function is switched as shown below according to the operating mode

and bit PF6DDR.

Modes 4 to 6*

AS output pin

Pin function

Note: * Modes 6 and 7 are provided in the on-chip ROM version only.

The pin function is switched as shown below according to the operating mode

and bit PF5DDR.

Modes 4 to 6*

RD output pin

Pin function

Note: * Modes 6 and 7 are provided in the on-chip ROM version only.

The pin function is switched as shown below according to the operating mode

and bit PF4DDR.

Modes 4 to 6*

HWR output pin

Pin function

Note: * Modes 6 and 7 are provided in the on-chip ROM version only.

The pin function is switched as shown below according to the operating mode

and bit PF3DDR.

Modes 4 to 6*

LWR output pin

Pin function

Note: * Modes 6 and 7 are provided in the on-chip ROM version only.

ø output pin