Product Info

Wi-Fi&BT Module Series
FC21 Hardware Design
FC21_Hardware_Design 14 / 52
3.2. Pin Assignment
32 34 35
33
36
37 38
29
28
30
31
27
26
24
23
25
22
21
20
19 17 16
18
15
14 13
47
48
49
46
1)
WLAN_EN
GND
RF_ANT
GND
GND
SDIO_CMD
SDIO_CLK
SDIO_D0
SDIO_D1
SDIO_D2
SDIO_D3
VDD_3V3
GND
GND
RESERVED
DBG_TXD
BT_UART_CTS
1)
BT_EN
1)
VIO
RESERVED
GND
LTE_UART_TXD
LTE_UART_RXD
BT_UART_RTS
1)
3
4
2
1
5
6
8
9
7
10
11
12
51
50
52
40
39
41
42
44 4543
PCM_IN
1)
PCM_SYNC
1)
PCM_CLK
1)
PCM_OUT
1)
BT_UART_TXD
1)
BT_UART_RXD
1)
32KHz_IN
2
)
GND GND
RESERVED
RESERVED RESERVED RESERVED
WAKE_ON_WIRELESS
Power
GND
WLAN
Reserved
Other signals
RF
BT
Figure 2: Pin Assignment of FC21 Module
1. Please keep all RESERVED pins open.
2.
1)
indicates that pins 7, 8, 10, 13~18 and 46 are BT function pins. BT function is under development.
3.
2)
indicates that 32KHz_IN is reserved on FC21 module since the sleep function is under
development.
NOTES