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MAIN_RXD
MAIN_RI
MAIN_DTR
MAIN_DCD*
BT_TXD*
BT_RXD*
BT_RTS*
BT_CTS*
DBG_RXD
DBG_TXD
The following figure illustrates the reference design for Bluetooth UART.
Module
The module provides 1.8 V UART. A voltage-level translator should be used if the application is equipped
with a 3.3 V UART.
RG520N-AT_Hardware_Design
70
DI
100
DO
258
DI
261
DO
59
DO
63
DI
61
DI
62
DO
108
DI
105
DO
BT_TXD
BT_RXD
BT_CTS
BT_RTS
Figure 27: UART Connection
Main UART receive
Main UART ring indication
Main UART data terminal
ready
Main UART data carrier
detect
Bluetooth UART transmit
Bluetooth UART receive
Request to send signal to
the module
Clear to send signal from
the module
Debug UART receive
Debug UART transmit
BT_UART_RXD
BT_UART_TXD
BT_UART_CTS
BT_UART_RTS
5G Module Series
Connect to the
peripheral's RTS.
1.8 V power domain.
Connect to the
peripheral's CTS.
1.8 V power domain.
1.8 V power domain.
Bluetooth
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