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Micrel, Inc.
Auto-Poll Programming Example
RF frequency 433.92MHz, bit rate 1kbps, bit width 1ms.
D[19] = 0, AGC fast attack enabled
D[18] = 1, watchdog timer is OFF
D[17] = 0, SQ pin floating, squelch is OFF
D[16] = 0
D[15] = 1, device is placed in autopoll
D[14:12] = 100, sleep time 160ms
D[11:9] = 011, bit check window time 457 μ s with D[4:3]
= 00
D[8:7] = 10, number of consecutive valid bits is 8
D[6:5] = 11, slice level 50%
D[4:3] = 00, demodulator bandwidth = 1.625kHz
D[2:0] = 000, no desense
From MSB to LSB, see Table 5:
MICRF219A
Figure 12. Auto-Poll Example
As noted in the Absolute Maximum Ratings section, the
D19
0
D11
0
D18
1
D10
1
D17
0
D9
1
D16
0
D8
1
D15
1
D7
0
D14
1
D6
1
D13
0
D5
1
D12
0
voltage on SCLK can go up to V DD + 0.3V without
causing damage. But applying V DD + 0.3V to SCLK can
put the part in an unknown test mode. If this accidently
happens, cycle the power supply to restore the part to
normal operation
D4
0
D3
0
D2
0
D1
0
D0
0
Table 5. Auto-Poll example bit sequence.
July 2011
16
M9999-071811-A
RadioTech@micrel.com or (408) 944-0800
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