Specifications

Bluegiga Technologies Oy
Page 9 of 64
3 Pinout and Terminal Description
AUDIO_OUT_N_LEFT
AUDIO_OUT_P_LEFT
AUDIO_OUT_P_RIGHT
AUDIO_OUT_N_RIGHT
GND
AUDIO_IN_N_LEFT
AUDIO_IN_P_LEFT
GND
AUDIO_IN_N_RIGHT
AUDIO_IN_P_RIGHT
MIC_BIAS
GND
VDD_CHG
VDD_BAT
LED0
SPI_MOSI
SPI_MISO
SPI_CLK
SPI_NCSB
PCM_CLK
PCM_SYNC
PCM_OUT
PCM_IN
PIO4
PIO5
PIO6 PIO7
PIO8
UART_NCTS UART_NRTS
RESET
GND
VDD_IO
UART_TXD
UART_RXD
PIO10
PIO9
USB_D+
USB_D-
PIO3
PIO2
PIO1
PIO0
AIO1
AIO0
GND
GND
GND
VREG_ENA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
GND
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
50
49
48
18 19 20 21 22 23 24 25 26
27 28 29 30
Figure 2: WT32i
Pin Number
Pin Name
Pad Type
Description
1
VREG_ENA
Input
SW configurable enable pin for the
internal regulators
2-3, 18, 31,
39, 43, 48
GND
GND
GND
17
VDD_IO
Power supply
1.7V - 3.6V power supply for the serial
interfaces and GPIOs
37
VDD_BAT
Power supply / Charger
output
2.7V - 4.4V supply voltage for the
internal regulators and output of the
battery charger
38
VDD_CHG
Power supply
Nominal 5V supply voltage for the
battery charger
Table 1: Supply Terminal Descriptions