ALPHA RF T
RANSCEIVER
FIFO and Reset Mode Command
bit
15 14 13 12 11
10
9
8
7
1
1
0
0
1
0
1
0
f3
f3..f0: Set FIFO interrupt level
sp: Select the length of the synchron pattern:
sp
0
1
Byte1
2Dh
Not used
Byte0 (POR)
D4h
D4h
ALPHA-TRX433S
ALPHA-TRX915S
6
f2
5
f1
4
f0
3
sp
2
al
1
ff
0
dr
POR
CA80h
Synchron Pattern (Byte1+Byte0)
2DD4h
D4h
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
1
14
1
13
0
12
0
11
1
10
1
9
1
8
0
7
b7
6
b6
5
b5
4
b4
3
b3
2
b2
1
b1
0
b0
POR
CED4h
This command is used to reprogram the synchronic pattern;
Receiver FIFO Read Command
bit
15
1
14
0
13
1
12
1
11
0
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
POR
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
1
14
1
13
0
12
0
11
0
10
1
9
0
8
0
7
a1
6
a0
5
rl1
4
rl0
3
st
2
fi
1
oe
0
en
POR
C4F7h
a1
0
0
1
1
a0
0
1
0
1
Controlled by MCU
Run once at power on
Keep offset when VDI hi
Keeps independently from VDI
rl1..rl0: select range limit
r1
0
0
1
1
r0
0
1
0
1
Range (fres)
No restriction
+15/-16
+7/-8
+3-4
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.
，
：
a1..a0: select AFC auto-mode
：
freq
315 433band: 2.5kHz
868band: 5kHz
915band: 7.5kHz
Page 9
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