Specifications

Bluegiga Technologies Oy
Page 49 of 64
10.3 Example Application Schematics
470 uF capacitor is required if it is likely that
the battery can be removed. If the battery is
not placed and the charger is enabled, the charger
will become unstable causing damage to the module
The charger LED will blink even
if the module is not powered.
However, in this case the module
can not read the calibration settings
and will be using the default minimum
current and voltage
SPI interface for FW updates and debugging
2
GND
3
GND
4
GND
5
AIO0
6
AIO1
7
PIO0
8
PIO1
9
PIO2
10
PIO3
11
USB_DN
12
USB_DP
13
PIO9
14
PIO10
15
RXD
16
TXD
17
3V3
18
G ND
19
RESET
20
RTS
21
CTS
22
PIO 8
23
PIO 7
24
PIO 6
25
PIO 5
26
PIO 4
27
PCM_ IN
28
PCM_ OUT
29
PCM_ SYNC
30
PCM_ CL K
31
GND
32
SPI_CS
33
SPI_CLK
34
SPI_MISO
35
SPI_MOSI
36
LED0
37
VDD_BAT
38
VDD_CHG
39
GND
40
MIC_BIAS
41
AUDIO_IN_P_RIGH
42
AUDIO_IN_N_RIGHT
43
AGND
44
AUDIO_IN_P_LEFT
45
AUDIO_IN_N_LEFT
46
AUDIO_OUT_N_RIGHT
47
AUDIO_OUT_P_RIGHT
48
AGND
49
AUDIO_OUT_N_LEFT
50
AUDIO_OUT_P_LEFT
1
MOD1
WT32I
1
A1
2
B1
4
A2
3
B2
SW9
D6
1 2
R1
10 0K
1 2
R2
10 0K
1
IN
3
EN
2
G ND
5
OUT
4
NR
U1
TPS79933
C38
2.2 u F
C49
2.2 u F
C1
10uF
3 2
4
1
U6
MIC_WM7120A
True
C27
1u F
R23
51 K, 5 0 V, 0.06 3W
L1
15nH
C15
15pF
C16
1uF/X7R
C17
1uF/X7R
L2
15nH
C2
15pF
1
2
MOD2
GENERAL_SPEAKER
1
2
MOD3
GENERAL_SPEAKER
1
MISO
3
CLK
5
CSB
2
3V3
4
MOSI
6
GND
J9
D2
R10
12 0R
C23
470uF/10V/20%/TAN
C14
4u 7/X5R/6.3V/10%
AK
D10
HS MG-C190
1
2
R61
51 0R, 50 V, 0.06 3W, +/-5 %
3V3
3V3
BATTERY
5V_CHARGER_INPUT
CHG_ LED
CHG_LED
BATTERY
Figure 32: Example schematic with on/off button, silicon microphone and stereo speakers