h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 249

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

8.2
8.2.1
Port 1 is an 8-bit I/O port. Port 1 pins also function as address bus output pins (A7 to A0), and as
8-bit PWM output pins (PW7 to PW0) (H8S/2138 Group only). Port 1 functions change according
to the operating mode. Port 1 has an on-chip MOS input pull-up function that can be controlled by
software.
Figure 8.1 shows the port 1 pin configuration.
Port 9 • 8-bit I/O port
Port
Description
Port 1
Overview
P97/WAIT
P96/ /EXCL
P95/AS/IOS
P94/WR
P93/RD
P92/IRQ0
P91/IRQ1
P90/IRQ2/
ADTRG
Pins
I/O port also functioning as
expanded data bus control input
(WAIT)
When DDR =
0: input port or
EXCL input
When DDR =
1 (after reset):
Expanded data bus control
output(AS/IOS, WR, RD)
I/O port also functioning as external interrupt input (IRQ0, IRQ1)
I/O port also functioning as external
interrupt input (IRQ2), and A/D
converter external trigger input
(ADTRG)
output
Mode 1
Expanded Modes
When DDR = 0 (after reset): input port or EXCL
input
When DDR = 1:
Rev. 4.00 Jun 06, 2006 page 195 of 1004
Mode 2, Mode 3
(EXPE = 1)
output
I/O port
I/O port
I/O port also functioning
as external interrupt input
(IRQ2) and A/D converter
external trigger input
(ADTRG)
Single-Chip Mode
Section 8 I/O Ports
Mode 2, Mode 3
REJ09B0301-0400
(EXPE = 0)