HT1350 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT1350 Datasheet PDF : 6 Pages
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HT1350
Pad Description
Pad No
Pad Name
I/O
Internal
Connection
Descriptions
1
TEST2
I/O
¾
For IC test only
2
TEST1
I/O
¾
For IC test only
3
OSC2
O
¾
Oscillator output
4
OSC1
I
¾
Oscillator input
5~18 OUT17~OUT4 O CMOS Display data output pads for segments
19~21 COM3~COM1 O NMOS Display data output pads for commons
22
CP3
O
*
Bias supply voltage pad for driving the LCD panel
23~24 CP2~CP1
O
*
LCD bias supply voltage control pads
25
STEP
I
CMOS
Pull-high
Step sensor input pad
26
WALK/RUN
I
CMOS
Pull-high
Walk/Run mode manual set pad
27
AUTO/MANU I
CMOS
Pull-high
Auto detection/Manual set selection pad
28
VDD
I
¾
Positive power supply
29
TEST3
I/O
¾
For IC test only
30
VSS
I
¾
Negative power supply (GND)
31
MODE
O
CMOS
Pull-high
LCD display mode selection
32
RESET
O
CMOS
Pull-high
System reset pad
Approximate internal connection circuits
C M O S IN
P u ll- h ig h
CM OS OUT
NM OS OUT
(F o r C O M 1 ~ C O M 3 )
VDD
C O M 1~
COM 3
VSS
C P 1~C P 3
CP1
CP3
O S C IL L A T O R
VDD
VDD
CP2
O SC1
O SC2
3
June 28, 1999
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