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The Command Data Interface Commands
The commands available through the serial interface are equivalent to the
hardware interface pins. This provides the option of using software and two
lines to configure the module instead of hardware and up to seven lines.
Figure 4 shows the commands for the Command Data Interface. See Appendix
B for more details of the command set.
NT Series Transceiver Command Data Interface Command Set
Command Data Structure
Input Message
ACK Reply Message
NoACK Reply Message
Command + Parameter + Value + Terminator (0xFF)
Cmd (0x06) + Rcvd Parameter + Value + Terminator (0xFF)
Cmd (0x15) + Rcvd Parameter + Error Code + Terminator (0xFF)
Function
Cmd
Parameter
Value
Description
Read / Write / Program
Channel
Baud Band
TX / RX Mode
Level Adjust Value
Pin Override Mask
01 – 03h
01 – 03h
01 – 03h
01 – 03h
01 – 03h
10h
11h
12h
13h
14h
00 – 64h
01 – 04h
00 – 01h
00 – 39h
00 – 0Fh
Channel (0 – 100)
Baud Band (1 – 4)
Transmit / Receive (0 – 1)
TX output power (0 – 57)
Software override of hardware settings
Read Only
Device Name
Firmware Version
Serial Number
Get RSSI Value
01h
01h
01h
01h
01h
02h
03h
1Fh
00h
00h
00h
00h
Returns the 2 character name (NT)
Returns the 2 byte firmware version
Returns the 4 byte serial number
Returns the RSSI value
Write Only
Return to Default
03h
8 0h
00h
Return to factory default
Error Codes
ERR_CMD
ERR_CHAN
ERR_BAUD
ERR_RXTX
ERR_LVL_ADJ
ERR_MASK
15h
15h
15h
15h
15h
15h
F1h
F2h
F3h
F4h
F5h
F6h
Invalid Command
Channel value is out of range
Baud band value is out of range
RX / TX value is out of range
Level Adjust value is out of range
Command is not enabled by the mask
Figure 4: NT Series Transceiver Command Data Interface Command Set
The pin override mask on the following page (Figure 5) enables or disables
software control of the configuration settings. It uses the four LSB bits of the
Value byte to control the four settings: Channel Selection (bit 0), Baud Band
(bit 1), TX / RX Mode (bit 2), and Level Adjust (bit 3). A 0 activates hardware
control through the pins; a 1 activates software control. If software control is
activated then the states of the hardware lines are ignored. Likewise, software
control of a feature is disabled when hardware control is active.
– 3 –
NT Series Command Data Interface
Reference Guide RG-00101
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