Hope RF RF12B, Руководство по программированию, Страница: 5 / 33

RF12 Program V1.1
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9
．
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;
10
．
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 8
th
SCK period.
11
．
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
fres
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 funcition