Product Info

Bluegiga Technologies Oy
Page 9 of 54
2 Pinout and Terminal Description
1V8_OUT
VREGIN
VREG_ENA
PIO1
GND
GND
GND
GND
GND
GND
GND
GND
PIO2 PIO3 PIO4 PIO5 PIO7 PIO9 GND 32kHz UART_TX
UART_RTS#
UART_RX GND
GND
UART_CTS#
SDIO_CLK
SDIO_SD_CS#
SDIO_CMD
VDD_PADS
PCM_SYNC
PCM_CLK
PCM_OUT
PCM_IN
SPI_MISO
SPI_CLK
SPI_CS#
SPI_MOSI
RST#
GND
GND
GND
GND
GND
GND
GND
GND
RFTP
4
5
6
7
8
9
10
11
12
13
14
15
16 17
18
19 20 21 22 23 24 25 26 27 28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
3
NC
Figure 1: WT21 pin out
PIN
NUMBER
PAD TYPE DESCRIPTION
NC 3 Not in use Leave floatin
g
or connect to GND
RST# 42
Input, weak internal pull-
u
p
Active low reset. Keep low for >5 ms
to cause a reset
GND 23 GND GND
Table 1: Terminal Descriptions