Reset Module - Renesas M3A-HS49 User Manual

2

2.6 Reset Module

This module controls the reset signal connected to the SH7149 mounted on the M3A-HS49.
Figure2.6.1 shows the block diagram of reset module in the M3A-HS49.
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
Reset IC
M51957BP
Ra
Ω
20K
Open-collector output
Input
Ω
Rb 10K
Delay capacitance
Rev.1.0 Dec 15, 2006
REJ10J0917-0100
Vcc
Output
Reset switch
0.1uF
Cd
SW2
Figure2.6.1 Block Diagram of Reset Module
H-UDI connector(J1,J2)
RES
Extension
Connector (J14)
Functional Overview
2.6 Reset Module
Extension connector(J9,10)
RESET
SH7149
RES
2-8