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Page 22
Electrical Interface
Output Signals
A Sample Schematic of Beeper Driving Circuit:
Here is a beeper driving circuit used in the evaluation board, EVK3000&1300.
R7
10R
12
R8
10R
12
Q2
713
D2
1N4148
1 2
BUZ
VIN
Q3
2SC1623
C1
10nF
BEEPER1
AS903Q
R5
1K
12
R6
100K
1
2
A Sample Schematic of LED Driving Circuit:
Here is the LED driving circuit used in the evaluation board, EVK3000&1300.
TXD
Q1
2SC1623
LED
BUZ
12 PIN F LEX CABLE
1
2
3
4
5
6
7
8
9
10
11
12
TR IG
/RESET
VCC_3.3V
RXD
R3
4.7K
12
R4
100K
12
D1
LED
R2
680R
12
VCC_3.3V
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