
TC32306FTG
2015-10-01
20
PLL_LD signal from DET_TMONI1 pin and/or DET_TMONI2 pin, set registers“h'14[D6:D4], [D2:D0]”.
(1)
Local Oscillation Setting for RX
Set Local Oscillator frequency at "Lower Local".
"Receiving Local Frequency" = "RF Recieving Frequency"–"IF Frequency" = "VCO Frequency" / "Division
Ratio"
Example 1
RF Frequency: 314.94MHz, IF Frequency: 280kHz, Division Ratio: 6 (Select 315MHz band)
”Receiving Local Frequency” = 314.94MHz - 0.28MHz = 1887.96MHz / 6
Example 2
RF Frequency: 314.94MHz, IF Frequency: 230kHz, Division Ratio: 6 (Select 315MHz band)
”Receiving Local Frequency” = 314.94MHz - 0.23MHz = 1888.26MHz / 6
(2)
Local Oscillation Setting for TX
Set Local Oscillator frequency equal to RF transmitting frequency.
"Transmitting Local Frequency" = "RF Transmitting Frequency" = "VCO Frequency" / "Division Ratio"
Example
RF Frequency: 314.94MHz, Division Ratio: 6 (Select 315MHz band)
”Transmitting Local Frequency” = 314.94MHz =1889.64MHz / 6
6.5 RF Receiver
For RF-Receiving, set register:h'0A[D5] = "0".
6.5.1 RF-Receiving Abstract
Table 6-15 Receiving Function Abstracts
Item
Function
RF-Receiving Frequency Band
315, 434, 868 / 915 MHz
IF Frequency
IF = 230kHz, setting of IF Filter Bandwidth: wide = 320kHz
IF = 280kHz, setting of IF Filter Bandwidth: middle = 270kHz
Single conversion system (Using Image Cancel Mixer)
Demodulation
FSK / ASK
FSK Demodulation
ASK Demodulation
IF Detection
Delay Detection,
Pulse Count Detection
Envelope Detection
Signal Detection
RSSI Detection, Noise Detection,
Preamble Detection
RSSI Detection, Preamble Detection
Additional Function
NIR (Near Interference Rejection) Filter
-
Bit Rate Filter Cutoff Frequency
0.436kHz -19.78kHz (12 steps)