Renesas M3A-HS25, Руководство пользователя

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Functional Overview
2.6 Reset Module
REJ10J0952-0100
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.
Vcc
Delay capacitance
Input Output
Ra
Open-collector output
Reset IC
M51957BP
SH7125
Rb
Vcc
Cd
0.1uF
Reset Switch
SW2
RESET
Extension connector
（
J5
）
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(J7)
RES
H-UDI connector
（
J1
）
RES
20K
Ω
10K
Ω
Figure2.6.1 Block Diagram of Reset Module
Rev.1.0 July 21, 2006 2-8