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2.6 Reset Module
REJ10J0917-0100
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.
Vcc
Delay capacitance
Input Output
Ra
Reset IC
M51957BP
Open-collector output
SH7149
Rb
Vcc
Cd
0.1uF
Reset switch
SW2
RESET
Extension connector(J9,10)
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
Extension
Connector (J14)
RES
H-UDI connector(J1,J2)
RES
20K
10K
Ω
Ω
Figure2.6.1 Block Diagram of Reset Module
Rev.1.0 Dec 15, 2006 2-8