MICRF219AYQS(2009) Просмотр технического описания (PDF) - Micrel
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Компоненты Описание
производитель
MICRF219AYQS
(Rev.:2009)
(Rev.:2009)
Micrel
MICRF219AYQS Datasheet PDF : 24 Pages
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Micrel
Operation
Received pulse edges trigger a programmable
window timer clocked by the reference frequency. If
the next pulse edge falls within this window the bit is
flagged as bad. Detected good bits are counted and
the device will wake up once sufficient pulses have
been received. Two bad pulses or a lack of pulses will
cause the device to go to sleep for a further sleep
Serial Interface Register Programming
Control Register Individual Truth Tables:
D0
D1
D2 MODE: Desense
0
X
X
No Desense - default
1
0
0
6dB Desense
1
1
0
16dB Desense
1
0
1
30dB Desense
1
1
1
42dB Desense
D3
D4 MODE:
Demod Bandwidth (at 433.92MHz)
0
0
1625Hz
1
0
3250Hz
0
1
6500Hz
1
1
13000Hz - default
D5
D6 MODE
1
0
Slice Level 30%
0
1
Slice Level 40%
1
1
Slice Level 50% - default
0
0
Slice Level 60%
D7
D8
MODE: Bit-Check Setting
0
0
Bit-check 0 bits - default
1
0
Bit-check 2 bits
0
1
Bit-check 4 bits
1
1
Bit-check 8 bits
MICRF219
timeout period.
Squelch
During normal operation, if four or less out of eight bit
pulses are good, the DO output is squelched. If good
bit count increases to seven or more in any eight
sequential bits, squelch is disabled allowing data to
output at DO pin.
D9 D10 D11
Set D3 to
Set D4 to
0
0
0
1
0
0
0
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
1
1
MODE:
Bit-Check Window Times (315
MHz)
D3=1 D3=0 D3=1 D3=0
D4=1 D4=1 D4=0 D4=0
98us, 196us, 393us, 785us
92us, 183us, 367us, 733us
85us, 170us, 341us, 681us
79us, 157us, 314us, 629us
72us, 144us, 288us, 577us
66us, 131us, 262us, 525us
59us, 118us, 236us, 473us
53us, 105us, 210us, 420us
D9 D10 D11
Set D3 to
Set D4 to
0
0
0
1
0
0
0
1
0
1
1
0
0
0
1
1
0
1
0
1
1
1
1
1
MODE:
Bit-Check Window Times
(433.92MHz)
D3=1 D3=0 D3=1 D3=0
D4=1 D4=1 D4=0 D4=0
71us, 143us, 285us, 570us
67us, 133us, 266us, 532us
62us, 124us, 247us, 494us
57us, 114us, 228us, 457us
52us, 105us, 209us, 419us
48us, 95us, 190us, 381us
43us, 86us, 172us, 343us
38us, 76us, 152us, 305us
Default State D9, D10, D11 is 111
D12
D13
D14 MODE:
Sleep Time
0
0
0
10ms
1
0
0
20ms
0
1
0
40ms Default
1
1
0
80ms
0
0
1
160ms
1
0
1
320ms
0
1
1
640ms
1
1
1
1280ms
D15 MODE: Auto-Poll
0
Awake – does not poll - default
1
Auto-polls with Sleep periods
January 2009
10
M9999-011509
(408) 944-0800
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