HT1350 Holtek Semiconductor Inc, HT1350 Datasheet - Page 3

• Manufacturer Part Number: HT1350
• Description: Step Counter
• Manufacturer: Holtek Semiconductor Inc

Pad Description
Approximate internal connection circuits
Pad No
1
2
3
4
5~18
19~21
22
23~24
25
26
27
28
29
30
31
32
TEST2
TEST1
OSC2
OSC1
OUT17~OUT4
COM3~COM1
CP3
CP2~CP1
STEP
WALK/RUN
AUTO/MANU
VDD
TEST3
VSS
MODE
RESET
Pad Name
I/O
I/O
I/O
I/O
O
O
O
O
O
O
O
I
I
I
I
I
I
Connection
Internal
Pull-high
Pull-high
Pull-high
Pull-high
Pull-high
NMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
¾
¾
¾
¾
¾
¾
¾
*
*
For IC test only
For IC test only
Oscillator output
Oscillator input
Display data output pads for segments
Display data output pads for commons
Bias supply voltage pad for driving the LCD panel
LCD bias supply voltage control pads
Step sensor input pad
Walk/Run mode manual set pad
Auto detection/Manual set selection pad
Positive power supply
For IC test only
Negative power supply (GND)
LCD display mode selection
System reset pad
3
Descriptions
June 28, 1999
HT1350