Manual

RF22
Version: 0.1 Date: 12/23/2008
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19.2 335 1 1 8 139 068DC 0D3
20 335 1 1 8 12C 06D3A 0DC
30 335 1 1 8 0C8 0A3D7 14A
38.4 335 1 1 8 09C 0D1B7 1A6
40 335 1 1 8 096 0DA74 1B7
Table21. RX Modem Configuration for OOK with Manchester Enabled
RX Modem Setting Examples for OOK (Manchester Enabled)
Appl Parameters
Register Values
Rb RX BW dwn3_bypass ndec_exp[2:0] filset[3:0] rxosr[10:0] ncoff[19:0] crgain[10:0]
[kbps] [kHz] 1Ch 1Ch 1Ch 20,21h 21,22,23h 24,25h
1.2 75 0 3 1 0D0 04EA5 13D
1.2 110 0 3 5 0D0 04EA5 13D
1.2 335 1 3 8 271 01A37 06B
1.2 420 1 3 A 271 01A37 06B
1.2 620 1 3 E 271 01A37 06B
2.4 335 1 2 8 271 01A37 06B
4.8 335 1 1 8 271 01A37 06B
9.6 335 1 1 8 139 0346E 0D3
10 335 1 1 8 12C 0369D 0DC
15 335 1 1 8 0C8 051EC 14A
19.2 335 1 1 8 09C 068DC 1A6
20 335 1 1 8 096 06D3A 1B7
30 335 1 0 8 0C8 051EC 14A
38.4 335 1 0 8 09C 068DC 1A6
40 335 1 0 8 096 06D3A 1B7
8. Auxiliary Functions
8.1. Smart Reset
The RF22 contains an enhanced integrated SMART RESET or POR circuit. The POR circuit contains both a classic
level threshold reset as well as a slope detector POR. This reset circuit was designed to produce reliable reset signal in
any circumstances. Reset will be initiated if any of the following conditions occur:
z
Initial power on, when VDD starts from 0V: reset is active till VDD reaches V
RR
(see table);
z
When VDD decreases below V
LD
for any reason: reset is active till VDD reaches V
RR
again;
z A software reset via "Register 08h. Operating Mode and Function Control 2": reset is active for time T
SWRST
z On the rising edge of a VDD glitch when the supply voltage exceeds the following time functioned limit:
Reset
t=0,
VDD starts to rise
t
VDD(t)
reset:
Vglitch>=0.4+t*0.2V/ms
actual VDD(t)
showing glitch
reset limit:
0.4V+t*0.2V/ms
VDD nom.
0.4V
P
T
Figure 22. POR Glitch Parameters