h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 1026

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

Appendix C I/O Port Block Diagrams
Rev. 4.00 Jun 06, 2006 page 972 of 1004
REJ09B0301-0400
P42
Legend:
WP4D: Write to P4DDR
WP4:
RP4:
Notes: 1. Output enable signal
*
*
2. Open drain control signal
1
2
Write to port 4
Read port 4
Hardware
Figure C.8 Port 4 Block Diagram (Pin P42)
standby
RP4
Q
P42DDR
Q
P42DR
WP4D
Reset
Reset
WP4
R
C
R
C
D
D
SCI2
IIC1
8-bit timer 0
Input enable
Clock output
Output enable
Clock output
SDA1 output
Transmit enable
SDA1 input
Reset input