HAC-UM Series RF Module Manual SHENZHEN HAC TECHNOLOGY CO., LTD.
FAX:+86-755-23981077 23981079
- 7 -
Note: The frequency points corresponding to each channel can be adjusted based on
the user
’
s needs.
1=Unplugging short circuiter (unconnected)
0 =Plugging in circuiter
b. Selection of interface mode:
HAC-UM provides 2 serial ports. COM1 (Pin3 and Pin4 of JP1) is fixed as UART serial port of
TTL level; COM2 (Pin6 and Pin7 of JP1) can choose non-standard RS232/485 interface mode
through D of JP2:
D=1 (Unplugging short circuiter) COM2 = RS-485
D=0 (Plugging in short circuiter) COM2 = RS-232
The following attention should be paid for the two serial ports provided by HAC-UM:
i.
For the data received from the air, when HAC-UM transmits it to the terminal
equipment through serial port, COM1 and COM2 output simultaneously, i.e. if the user
connects one device at COM1 and COM2 respectively, they both can receive the data
simultaneously.
ii.
For the data transmitted from the terminal equipment and ready to transmit to the air,
HAC-UM can only receive the data sent from either COM1 or COM2 but not
simultaneously.
Suggestion: The users are recommended to use one serial port of COM1 or COM2.
c. Parity mode selection:
HAC-UM can support no-parity or even parity modes of the serial communication UART, i.e.
8N1/8E1, which can be chosen by E of JP2:
E=1 (Unplugging short circuiter) Parity: 8E1 (even parity)
E=0 (Plugging in short circuiter) Parity: 8N1 (no parity)
NOTE: The communication data rate can not be set by user, it is confirmed when
placing orders and set before delivery. The short circuiter will be effective by re-powering
on if its method of plugging in changed.
5. Supported protocol and Transmit capability