FEDL63187B-06
1Semiconductor
ML63187B/63189B
APPLICATION CIRCUITS (ML63187B)
• Crystal oscillation is selected as low-speed
oscillation by mask option.
• RC oscillation is selected as high-speed
LCD
oscillation by software.
• Ports are powered from external memory
power source.
• CV is an IC power supply bypass capacitor.
• Values of Ca, Cb, Cc, Cd, Ce, Cl, Cb12, C12,
Ch, and CG, are for reference only.
Crystal
32.768 kHz
COM1-16
SEG0-63
XT0
OSC0
OSC1
ROSH
CG
5 to
25 pF
XT1
1.0 µF
Ch
VDDH
PE.3
PE.2
PE.1
PE.0
1.5 V
VDD
1.0 µF
Cb12
Cv
CB1
PB.3
PB.2
PB.1
PB.0
1.0 µF
0.1 µF
CB2
VDDL
Cl
Ce
Cd
Cc
Cb
Ca
0.1 µF
0.1 µF
0.1 µF
0.1 µF
0.1 µF
VDD5
VDD4
VDD3
VDD2
ML63187B
VDD1
C1
C12
0.1 µF
C2
Push SW
RESET
TST1
TST2
MD
VDD
VDDl
Buzzer
MDB
VSS
Note:
VDDI is the power supply pin for the input-output ports.
Be sure to connect the VDDI pin either to the positive power supply pin (VDD) of this device
or to the positive power supply pin of the external memory.
Application Circuit Example with Power Supply Backup
31/36
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