Reset Module - Renesas M3A-HS25 User Manual

2

2.6 Reset Module

This module controls the reset signal connected to the SH7125 mounted on the M3A-HS25.
Figure2.6.1 shows the block diagram of reset module in the M3A-HS25.
Reset IC output delay time：td = 0.34 × Cd(pF)usec = 34ms
Reset IC output detection voltage：Vs = 1.25 × (Ra+Rb)/Rb = 3.75V
Vcc
Open-collector output
Reset IC
Ra
20KΩ
M51957BP
Input
Rb
10KΩ
Delay capacitance
Rev.1.0 July 21, 2006
REJ10J0952-0100
Vcc
Output
Reset Switch
0.1uF
Cd
SW2
Figure2.6.1 Block Diagram of Reset Module
H-UDI connector（J1）
RES
Extension
connector(J7)
Functional Overview
2.6 Reset Module
Extension connector（J5）
RESET
SH7125
RES
2-8