Data Sheet

深圳市中龙通电子科技有限公司 Page 14
WiFi Module
CDW-20U5622-00
11. Application schematic
SD_D0
+3.3V
GND
SD_D3 SD_D1
GND
1
WL_BT_ANT
2
GND
3
UART3_RX
4
ESM_CLK
5
CHIP_EN
6
INT
7
ESMCSN
8
VDD
9
NC
10
NC
11
RST_N
12
GPIO1
13
SDIO_DATA_3
15
SDIO_DATA_2
14
SDIO_DATA_CMD
16
SDIO_DATA_CLK
17
SDIO_DATA_1
19
GND
20
NC
21
SDIO_DATA_0
18
VDDIO
22
NC
23
NC
24
PCM_OUT
25
PCM_CLK
26
PCM_IN
27
PCM_SYNC
28
UART3_TX
29
ESMD0
30
GND
31
ESMD1
32
GND
33
NC
34
ESMD2
35
GND
36
ESMD3
37
RFCTL_7
38
RFCTL_6
39
RFCTL_5
40
UART0_RTS_N
41
UART0_TXD
42
UART0_RXD
43
UART0_CTS_N
44
SD_D2 SD_CLK SD_CMD
GND
SD_INT
GND
WL/BT Power enable
Int to AP PCM_IN
Main
GND
PCM_OUT
PCM_CLK
PCM_SYNC
L8 5.6pF
C162
NC
C163
NC
ANT
C164
10uF
External reset input
VDD_IO R37
47K
C165
0.1uF
VDD_IO
VDDIO: 1.8V (only)
12. Layout Recommendation
(Top view)