Specifications

20
18 DGND
19 RESET
20 RTS#
21 CTS#
22 PIO8
23 PIO7
24 PIO6
25 PIO5
26 PIO4
27 PCM_IN
28 PCM_OUT
29 PCM_SYNC
30 PCM_CLK
31 DGND
32 SPI_CS#
33 SPI_CLK
34 SPI_MISO
35 SPI_MOSI
36 LED0
37 VDD_BAT
38 VDD_CHG
39 AGND
40 MIC_BIAS
41 AUDIO_IN _P_RIGHT
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
RFTP RF test point
Table 8: WT32 device terminals
4.1 Device Terminal Functions
DGND
Connect digital GND pins to the ground plane of the PCB.
AGND
Ground for the audio signals. AGND and DGND are internally combined in WT32. Use solid
ground plane for AGND and keep AGND and DGND planes separated.
VDD_IO
Supply voltage connection for the digital I/Os of the module. Supply voltage at this pin can
vary between 1.8 V and 3.3 V. Output voltage swing at the digital terminals of WT32 is 0
to VDD_IO.