User's Manual

Silicon Laboratories Finland Oy
Page 7 of 51
2 Pinout and Terminal Description
Figure 1: WT11u connection diagram
Pad name
Pad
number
Pad type
Description
RESET
17
Input
Reset input, active high, internal 220kohm pull-down. Keep
high for >5ms for reset
GND
1, 14, 15, 28
GND
Ground connection, connect all to a ground plane with
minimal trace lengths
VDD_PA
2
Supply voltage
Supply voltage for RF power amplifier
VDD
16
Supply voltage
Chipset supply voltage
Table 2: Supply and RF Terminal Descriptions
WT11i
GND
VDD_PA
PIO2
PIO3
UART_RTS#
UART_RX
PCM_OUT
USB+
USB-
UART_CTS#
PCM_IN
PCM_CLK
PCM_SYNC
GND
GND
AIO
UART_TX
PIO5
SPI_MOSI
SPI_MISO
SPI_CLK
SPI_CS#
PIO4
PIO7
PIO6
RESET
VDD
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15