HD6432138SW datasheet(244/1061 Pages) RENESAS

244 / 1061 page

Section 8 I/O Ports

Rev. 4.00 Jun 06, 2006 page 190 of 1004

REJ09B0301-0400

Table 8.1

H8S/2138 Group Port Functions

Expanded Modes

Single-Chip Mode

Port

Description

Pins

Mode 1

Mode 2, Mode 3

(EXPE = 1)

Mode 2, Mode 3

(EXPE = 0)

Port 1 • 8-bit I/O port

•On-chip

MOS input

pull-ups

•LED drive

capability

P17 to P10/

A7 to A0/

PW7 to PW0

Lower address

output

(A7 to A0)

When DDR = 0

(after reset): input

port

When DDR = 1:

lower address

output (A7 to A0) or

PWM timer output

(PW7 to PW0)

I/O port also functioning

as PWM timer output

(PW7 to PW0)

Port 2 • 8-bit I/O port

•On-chip

MOS input

pull-ups

•LED drive

capability

P27/A15/PW15/

CBLANK

P26/A14/PW14

P25/A13/PW13

P24/A12/PW12

P23/A11/PW11

P22/A10/PW10

P21/A9/PW9

P20/A8/PW8

Upper address

output

(A15 to A8)

When DDR = 0

(after reset): input

port or timer

connection output

(CBLANK)

When DDR = 1:

upper address

output (A15 to A8),

PWM timer output

(PW15 to PW12),

timer connection

output (CBLANK),

or output ports (P27

to P24)

I/O port also functioning

as PWM timer output

(PW15 to PW8) and timer

connection output

(CBLANK)

Port 3 • 8-bit I/O port

•On-chip

MOS input

pull-ups

•LED drive

capability

P37 to P30/

HDB7 to HDB0/

D7 to D0

Data bus input/output (D7 to D0)

I/O port also functioning

as host interface data bus

input/output (HDB7 to

HDB0)

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