ALPHA-TX Datasheet, PDF (13/16 Pages) List of Unclassifed Manufacturers – ALPHA RF MODULES

ALPHA RF MODULES
ALPHA-TX
ALPHA-RX
r2..r0: select DRSSI threshold
r2
r1
r0
RSSIsetth [dBm]
0
0
0
-103
0
0
1
-97
0
1
0
-91
0
1
1
-85
1
0
0
-79
1
0
1
-73
1
1
0
-67
1
0
1
-61
The actual DRSSI threshold is related to LNA setup:
RSSIth = RSSIsetth + GLNA.
en: Enable the receiver
．5 Wake-Up Timer Command
bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 1 r4 r3 r2 r1 r0 m7 m6 m5 m4 m3 m2 m1 m0 E196h
The wake-up period is determined by:
Twake-up = M * 2^R [ms]
For continual operation, bit ‘et’ must be cleared and set
．6 Low Duty-Cycle 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 0 0 d6 d5 d4 d3 d2 d1 d0 en CCOEh
d6..d0: Set duty cycle D.C.= (D * 2 +1) / M *100%
en：Enable low duty cycle mode
．7 Low Battery Detector and Microcontroller Clock Divider Command
bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 0 0 1 0 d2 d1 d0 t4 t3 t2 t1 t0 C200h
d2..d0: select frequency of CLK pin
d2 d1 d0 Clock frequency[MHz]
0
0
0
1
0
0
1
1.25
0
1
0
1.66
0
1
1
2
1
0
0
2.5
1
0
1
3.33
1
1
0
5
1
1
1
10
CLK signal is derive form crystal oscillator and it can be applied to MCU clock in to save a second
crystal. If not used, please set bit “dc” to disable CLK output
To integrate the load capacitor internal can not only save cost, but also adjust reference frequency
by software
t4..t0: Set threshold voltage of Low battery detector： Vlb=2.2+T*0.1 [V]
DSALPHA-3 Jul 09
©2009 RF Solutions Ltd.
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