Renesas CPU Board M3A-HS19, Руководство пользователя

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Features and Specifications
2.10 Reset Module
Rev.1.01 Oct 28, .2008
2-21
REJ10J1351-0101
2
2.10 Reset Module
Reset module controls reset signals connected to the SH7619 MCU, a flash memory and connectors. Software controls to
reset PCMCIA connector.
Figure 2.10.1 shows the schematic diagram of resets.
3.3 V
SW2
Reset switch
Reset
IC
M51957BFP(U13)
Input
Delay capacitor
Flash memory
*
*
Open collector output
Output
3.3 V
RESET#
Ra
Rb
Cd
Reset IC output delay time: td
=
0.34
×
Cd(pF)µsec
＝
34 ms
Reset IC output detect voltage: Vs = 1.25 × = 2.5 V
)
Rb
Ra+Rb
)
10
K
Ω
10
K
Ω
0.1 µF
Expansion connector
RESET#
RES#
SH7619
H-UDI connector
RESET#
100
Ω
LVC14(U14)
S08(U15)
RESET_IN(J9-1)
PC09/RX_ER
RESET
1OE#
2OE#
Bus switch
(U9)
JP2
PCMCIA(J4)
PC20/WOL
Figure 2.10.1 M3A-HS19 Reset System