參數(shù)資料
型號(hào)： AMIS-53000
英文描述： Frequency Agile Transceiver
中文描述： 捷變頻收發(fā)器
文件頁(yè)數(shù)： 63/99頁(yè)
文件大小： 2638K
代理商： AMIS-53000
AMIS-53000
Frequency Agile Transceiver
Data Sheet
Table 54: Sniff Config - 0X11 [17]
Bit
Name
State
000
001
010
011
100
101
110
111
11
10
01
Comment
RSSI filter bandwidth =300Hz
RSSI filter bandwidth = 600Hz
RSSI filter bandwidth = 1.2kHz
RSSI filter bandwidth = 2.4kHz
RSSI filter bandwidth = 4.8kHz
RSSI filter bandwidth = 9.6kHz
RSSI filter bandwidth = 19.2kHz
RSSI filter bandwidth = 38.4kHz
100
500
100
wake up target number. It is adjusted down when there are fewer
false wake ups than the target number. Entering a number other
than 00 in this register will enable the auto-threshold.
7:5
SNIFF_FILTER
4,3
Auto-Threshold
Count Value
00
Disable
This is the number of Sniff cycles to count false wake ups due to the
noise level, so that the threshold level can be adjusted. It is
adjusted higher when the number of false wake ups exceeds the
2
NU
1
NU
1
Sniff interval timer resolution is 100ms (interval between Sniff signal detection
events is (Sniff interval) times (Sniff resolution)
Sniff interval timer resolution is 500us 100ms (interval between Sniff signal
detection events is (Sniff interval) times (Sniff resolution)
0
Sniff Interval
Resolution
0
6.7.2.2.
Sniff Interval Timer
Used to specify the period (time between Sniff events) of the Sniff operation. The Sniff interval is this value times the Sniff interval
resolution value (set in the Sniff config register).
Table 55: Sniff Interval Timer - 0X12 [18]
Bit
Name
Comment
7:0
SNIFF_INT [7:0]
Sniff interval timer =SNIFF_INT* Sniff interval timer resolution
6.7.2.3.
Energy Dwell Timer
Length of time receiver will stay on in a Sniff cycle checking for the presence of a signal. Also used for a receive command when the
wake on energy bit is asserted in RX config. When used for a MICS market device, this may need to be set to 10 milli-seconds for CCA
to be compatible with the MICS standard.
Table 56: Energy Dwell Timer - 0X13 [19]
Bit
Name
Comment
00h: Energy dwell timer not used, energy determined by an impulse sample
01h – FEh: Energy dwell time = E_DWELL * 100us
FFh: Receiver remains on until energy threshold is met
7:0
E_DWELL[7:0]
6.7.2.4.
Energy Threshold
Sets the threshold for either wake on energy or Sniff Mode signal acquisition. If the automatic noise floor detection is enabled in Sniff,
the AMIS-53000 will overwrite the contents of this register each time a new threshold is calculated.
63
AMI Semiconductor
– Aug. 05, Rev. 1.0
www.amis.com
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