ALPHA-TRX433S Datasheet, PDF (9/14 Pages) rfsolutions.ltd – The Alpha Modules are extremely cost effective but high performance radio modules.

ALPHA RF TRANSCEIVER
ALPHA-TRX433S
ALPHA-TRX915S
FIFO and Reset Mode Command
bit 15 14 13 12 11 10 9 8 7 6
1 1 0 0 1 0 1 0 f3 f2
f3..f0: Set FIFO interrupt level
sp: Select the length of the synchron pattern:
sp
Byte1
Byte0 (POR)
0
2Dh
D4h
1
Not used
D4h
543210
f1 f0 sp al ff dr
Synchron Pattern (Byte1+Byte0)
2DD4h
D4h
POR
CA80h
al: select FIFO fill start condition
al
condition
0
Sync-word
1
Always
ff: Enable FIFO fill
dr： Disable hi sensitivity reset mode
Synchron pattern Command
bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1
1
0
0
1
1
1 0 b7 b6 b5 b4 b3 b2 b1 b0 CED4h
This command is used to reprogram the synchronic pattern;
Receiver FIFO Read Command
bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 B000h
This command is used to read FIFO data when FFIT interrupt generated. FIFO data output
starts at 8th SCK period.
AFC Command
bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 0 1 0 0 a1 a0 rl1 rl0 st fi oe en C4F7h
a1..a0: select AFC auto-mode：
a1
a0
0
0
Controlled by MCU
0
1
Run once at power on
1
0
Keep offset when VDI hi
1
1
Keeps independently from VDI
rl1..rl0: select range limit
r1
r0
Range (fres)
0
0
No restriction
0
1
+15/-16
1
0
+7/-8
1
1
+3-4
freq
315，433band: 2.5kHz
868band: 5kHz
915band: 7.5kHz
st: st goes hi will store offset into output register
fi: Enable AFC hi accuracy mode
oe: Enable AFC output register
en: Enable AFC function
DSALPHA-TRX-6 Feb ‘11
©2009 RF Solutions Ltd.
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