
PN6280_Hardware Design
Copyright © JSC NIIMA PROGRESS and NAVIA LLC
21
52
UART0_RXD
DI
UART0 receive data input
53
UART0_RI
DO
UART0 Ring Indicator. It can be used as wake
out signal to host from module
54
UART0_DCD
DO
UART0 Data Carrier Detect
55
UART0_TXD
DO
UART0 transmit data output
56
UART0_DTR
DI
Data Terminal Ready(wake up module)
3.6.2 UART application
UART1 can be used for software debugging process. We suggest that the users retain this interface
and set aside the test point.
If used in communication between the module and application processor, and the level is 1.8V, the
connection mode is shown in Figure 3-8 and figure 3-9. You can use the complete RS232 mode, 4
wires or 2 wires mode connection. Module interface level is 1.8V. If the AP interface level does not
match, you must increase the level conversion circuit.
Figure 3-8 Connect to AP method(4lines)
PN6280
TXD
RXD
CTS
RTS
GND
AP
TXD
RXD
CTS
RTS
GND
PN6280
Serial Port
TXD
RXD
CTS
RTS
DTR
DCD
RING
GND
AP
Serial Port
TXD
RXD
CTS
RTS
DTR
DCD
RING
GND