H8S2189R Datasheet, PDF (58/812 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2100 Series

Section 1 Overview
Type
Symbol Pin No.
I/O
Name and Function
I/O ports
PG7 to
PG0
51 to 58
Input/ Eight input/output pins
Output
Notes: 1. Pins PE4 to PE1 are not supported by the system development tool (emulator).
2. Following precautions are required on the power-on reset signal that is applied to the
ETRST pin.
The reset signal should be applied on power supply.
Apart the power on reset circuit from this LSI to prevent the ETRST pin of the board
tester from affecting the operation of this LSI.
Apart the power on reset circuit from this LSI to prevent the system reset of this LSI
from affecting the ETRST pin of the board tester.
Figure1.3 shows an example of design in which signals for reset do not affect each other.
Board edge pin
System
reset
Power On
Reset circuit
ETRST
This LSI
RES
ETRST
Figure 1.3 Sample Design of Reset Signals with no Affection Each Other
Rev. 2.00 Aug. 03, 2005 Page 16 of 766
REJ09B0223-0200