h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 272

• 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
8.6
8.6.1
Port 5 is a 3-bit I/O port. Port 5 pins also function as SCI0 I/O pins (TxD0, RxD0, SCK0), and the
IIC0 I/O pin (SCL0) (option in H8S/2138 Group only). In the H8S/2138 Group, P52 and SCK0
are NMOS push-pull outputs, and SCL0 is an NMOS open-drain output. Port 5 pin functions are
the same in all operating modes.
Figure 8.13 shows the port 5 pin configuration.
8.6.2
Table 8.11 shows the port 5 register configuration.
Table 8.11 Port 5 Registers
Name
Port 5 data direction register
Port 5 data register
Note:
Rev. 4.00 Jun 06, 2006 page 218 of 1004
REJ09B0301-0400
* Lower 16 bits of the address.
Port 5
Overview
Register Configuration
Port 5
Figure 8.13 Port 5 Pin Functions
Abbreviation
P5DDR
P5DR
Port 5 pins
P52 (I/O)/SCK0 (I/O)/SCL0 (I/O)
P51 (I/O)/RxD0 (Input)
P50 (I/O)/TxD0 (Output)
R/W
W
R/W
Initial Value
H'F8
H'F8
Address *
H'FFB8
H'FFBA