NEXT VCC
VCC
P0.0 (BUSY) P0.1 (DATA)
D
P0.2 (CLK) P0.3 (RESET) PLAY/STOP
VSS HOST MICRO
1
14
2
13
3
12
4
11
5
10
6
9
7
8
PREVIOUS
1
C
13
3
12
4
11
5
10
6
9
7
8
R1
RESET VCC
C1 220uF/16V
R1
470
LED
Option 2: KEY MODE (STAND ALONE)
C
8/16/32 Ohm (0.25W) SPEAKER 1K
AUDIO
0.1uF
C1
0.1uF
VCC
10K
220uF/16V 1K VCC
220uF
LM386N
470
Option 1: 2-WIRE SERIAL MODE
D
SOMO-14D
AUDIO Out
SOMO-14D
LED
8/16/32 Ohm (0.25W) SPEAKER
Optional
14
2
Optional AUDIO Out
3 2 7
IN+ V OUT INGAIN BYPASS GAIN
pin6 = VDD pin4 = VSS
NPN
5 1 8
SPEAKER 10
47nF
PNP
B
B
POWER SUPPLY OPTIONS PIN CONFIGURATION NEXT NC CLK DATA BUSY A
PLAY/STOP PREVIOUS
1
14
2
13
3
12
4
11
5
10
6
9
7
8 SOMO-14D
3.3V
VCC
5V
VCC
10K
AUDIO NC
BUSY
Note: Using the BUSY signal with transistor switching circuit prevents Audible clicks when file plays.
SPKSPK+
1N4001
Optional Power Audio Circuit (using 16bit PWM/DAC AUDIO pin 14)
1N4001
RESET VCC
GND VCC
3.0V BATTERY
Title Size A4 Date: File:
A
SOMO-14D Applications Number
Revision
Rev2
26-Nov-2009 Sheet of Y:\Projects\AUDIO-MP3-SOUND\WAYTRONIC\WTV020-SD-mini Drawn By: V1.DDB
