Users Manual

PN17TR 915MHz Transceiver Module Inventis Technology Pty Ltd
Unit 4, 2 Southridge St. Eastern Creek NSW, Australia Page 13
1:0
LENGTH_CONFIG[1:0]
1 (01)
R/W
Configure the packet length
Setting
Packet length configuration
0 (00)
1 (01)
2 (10)
3 (11)
Fixed packet length mode. Length
configured in PKTLEN register
Variable packet length mode. Packet
length configured by the first byte
after sync word
Infinite packet length mode
Reserved
0x09: ADDR – Device Address
Bit
Field Name
Reset
R/W
Description
7:0
DEVICE_ADDR[7:0]
0 (0x00)
R/W
Address used for packet filtration. Optional
broadcast addresses are 0 (0x00) and 255 (0xFF).
0x0A: CHANNR – Channel Number
Bit
Field Name
Reset
R/W
Description
7:0
CHAN[7:0]
0 (0x00)
R/W
The 8-bit unsigned channel number, which is
multiplied by the channel spacing setting and added
to the base frequency.
0x0B: FSCTRL1 – Frequency Synthesizer Control
Bit
Field Name
Reset
R/W
Description
7:6
R/0
Not used
5
0
R/W
Reserved
4:0
FREQ_IF[4:0]
15 (0x0F)
R/W
The desired IF frequency to employ in RX. Subtracted
from FS base frequency in RX and controls the digital
complex mixer in the demodulator.
f = f
xdsc
/2
10
- FREQ_IF
The default value gives an IF frequency of 381kHz,
assuming a 26.0 MHz crystal.
0x0C: FSCTRL0 – Frequency Synthesizer Control
Bit
Field Name
Reset
R/W
Description
7:0
FREQOFF[7:0]
0 (0x00)
R/W
Frequency offset added to the base frequency before
being used by the frequency synthesizer. (2s-
complement).
Resolution is F
XTAL
/2
14
(1.59kHz-1.65kHz); range is
±202 kHz to ±210 kHz, dependent of XTAL frequency.