h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 288

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

Section 8 I/O Ports
8.10
8.10.1
Port 9 is an 8-bit I/O port. Port 9 pins also function as external interrupt input pins (IRQ0 to
IRQ2), the A/D converter external trigger input pin (ADTRG), host interface input pins (ECS2,
CS1, IOW, IOR) (H8S/2138 Group only), the IIC0 I/O pin (SDA0) (option in H8S/2138 Group
only), the subclock input pin (EXCL), bus control signal I/O pins (AS/IOS, RD, WR, WAIT), and
the system clock ( ) output pin. In the H8S/2138 Group, P97 is an NMOS push-pull output. SDA0
is an NMOS open-drain output, and has direct bus drive capability.
Figure 8.17 shows the port 9 pin configuration.
Rev. 4.00 Jun 06, 2006 page 234 of 1004
REJ09B0301-0400
Port 9
Port 9
Overview
Port 9 pins
P97/WAIT/SDA0
P96/ /EXCL
P95/AS/IOS/CS1
P94/WR/IOW
P93/RD/IOR
P92/IRQ0
P91/IRQ1
P90/IRQ2/ADTRG/ECS2
Figure 8.17 Port 9 Pin Functions
Pin functions in modes 1, 2 and 3 (EXPE = 1)
WAIT (Input)/P97 (I/O)/SDA0 (I/O)
AS (Output)/IOS (Output)
WR (Output)
RD (Output)
P92 (I/O)/IRQ0 (Input)
P91 (I/O)/IRQ1 (Input)
P90 (I/O)/IRQ2 (Input)/ADTRG (Input)
Pin functions in modes 2 and 3 (EXPE = 0)
P97 (I/O)/SDA0 (I/O)
P96 (Input)/ (Output)/EXCL (Input)
P95 (I/O)/CS1 (Input)
P94 (I/O)/IOW (Input)
P93 (I/O)/IOR (Input)
P92 (I/O)/IRQ0 (Input)
P91 (I/O)/IRQ1 (Input)
P90 (I/O)/IRQ2 (Input)/ADTRG (Input)/ECS2 (Input)
(Output)/P96 (Input)/EXCL (Input)