Product Info

Wi-Fi&BT Module Series
FC21 Hardware Design
FC21_Hardware_Design 26 / 52
3.5.3. Coexistence Interface
The following table shows the pin definition of coexistence interface
1)
.
Table 13: Pin Definition of Coexistence Interface
The following figure shows the coexistence interface connection between FC21 and EC2x&EG2x-G.
Figure 10: Coexistence Interface Connection
Pin Name Pin No. I/O Description Comment
LTE_UART_TXD 5 DO
LTE/Wi-Fi&BT
coexistence signal
1.8V power domain.
If unused, keep these pins open.
LTE_UART_RXD 6 DI
LTE/Wi-Fi&BT
coexistence signal