HT7510
Pad Description
P a d No.
P a d Na m e
I/O
B
I
Descr ip tion
1
2
3
4
5
6
7
LOWC
VSS
SC
For low voltage detector, open the pin when not in use.
Power supply GND
B
O
O
I
Common point, NMOS open drain
RF
Connect reference resistor, PMOS open drain
Connect sensor resistor, PMOS open drain
Power supply positive
RS
VDD
PSW
I
Pull-low input pin, press switch to turn the power on or off
Pull-low test pin, for production, floating test, LCD displays
the real time value, when connected to VDD, LCD displays
the highest value.
8
TEST2
I
9
CLFH
OSCI
I
Connecting VSS for °C, connect to VDD for °F
For system oscillator in
For system oscillator out
Buzzer output 1
10
I
11
OSCO
BZ1
O
O
O
O
O
O
I
12
13
BZ2
Buzzer output 2
14
EN
Interface with HT84018-0D
Interface with HT84018-0D
Interface with HT84018-0D
Interface with HT84018-0D
LCD backplane drive, 3 level voltage out
LCD segment drive
15
DATA
READY
BUSY
COM1~COM3
SA1~SA3
SB1~SB3
SC1~SC3
SD1
16
17
18~20
21~23
24~26
27~29
30
O
O
O
O
O
O
O
B
I
LCD segment drive
LCD segment drive
LCD segment drive
31
CAP15V
C512
1.5V output for LCD display
Test pin for IC (512Hz output)
Test pin for IC
32
33
TV
34
TEST1
TTM
Test pin for IC
35
I
Test pin for IC
36
TS816
I
Test pin for IC
4
10th Feb ’99