LCD Type MCU
Application Circuits
RC or Crystal System Oscillator with RTC Oscillator
(Except HT49C30L, HT49C50L, HT49C70L)
V
D D
0 .0 1
m
F
1 0 0 k
W
0 .1
m
F
V D D
R E S
C O M 0 ~ C O M 3
S E G 0 ~ S E G 3 9
L C D
P A N E L
1 0 k
W
V L C D
C 1
L C D
P o w e r S u p p ly
0 .1
m
F
V S S
0 .1
m
F
C 2
V 1
0 .1
m
F
O S C
C ir c u it
S e e B e lo w
O S C 1
O S C 2
V 2
0 .1
m
F
O S C 3
P A 0 ~ P A 7
P B 0 ~ P B 7
P C 0 ~ P C 7
IN T 0
IN T 1
T M R 0
T M R 1
O S C 4
H T 4 9 R 7 0 A -1 /H T 4 9 C 7 0 -1
V
D D
4 7 0 p F
R
O S C
R C
O S C 1
f
S
Y S
S y s te m
O S C
O s c illa to r
< 1 M
W
2 4 k
W
< R
/4
O S C 2
O S C 1
C 1
C ry s ta l S y s te m
O s c illa to r
C 2
R 1
O S C 2
F o r c o m p o n e n t v a lu e s ,
c o n s u lt O s c illa to r s e c tio n
O S C
C ir c u it
Note
In this application drawing, the HT49R70A-1/HT49C70-1 is taken as an example, however, this
application can also be applied to the HT49R30A-1/HT49C30-1, HT49R50A-1/HT49C50-1 and
HT49RU80/HT49CU80 devices.
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