Wi-Fi&Bluetooth Module Series
FC64E_Hardware_Design
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The module provides 1.8 V UART interfaces. A level translator should be used if customers’ application is
equipped with a 3.3 V UART interface. A level translator TXS0104 provided by Texas Instruments is
recommended. The following figure shows a reference design.
Figure 8: Reference Circuit with Translator Chip
3.6.3. BT_WAKEUP_HOST
*
and HOST_WAKEUP_BT
*
BT_WAKEUP_HOST and HOST_WAKEUP_BT are used to wake up the host and the module.
Table 10: Pin Definition of BT_WAKEUP_HOST and HOST_WAKEUP_BT
3.6.4. PCM Interface
*
The PCM interface is for audio over Bluetooth. The following table shows the pin definition of PCM
interface.
BT_RTS
18
DO
Bluetooth UART request to
send
1.8 V power domain.
BT_CTS
19
DI
Bluetooth UART clear to send
BT_TXD
21
DO
Bluetooth UART transmit
BT_RXD
20
DI
Bluetooth UART receive
Pin Name
Pin No. I/O
Description
Comment
BT_WAKE_HOST
41
DO
Bluetooth wakes up host
1.8 V power domain.
HOST_WAKE_BT
22
DI
Host wakes up Bluetooth
