参数资料
型号: AS3931-ZTSU
厂商: ams
文件页数: 24/31页
文件大小: 0K
描述: IC ASK RECEIVER LF 3CH 16-TSSOP
标准包装: 96
RF 型: 接收器
频率: 19kHz ~ 150kHz
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 管件
AS3931
Datasheet - C o n f i g u r i n g t h e P r o d u c t
9.5.1
M0 (Correlator Off)
Bit M0 is used to simultaneously turn off all 3 correlators. This is done by turning off the correlator clocks. This can be used to reduce power
consumption when the Direct Data Mode is used.
Table 24. M0 Bit Mode
M0
0
1
Mode
Low RSSI step
High RSSI step
9.5.2
M1 (Single/Double Wake Pattern)
Bit M1 selects the number of data patterns that are necessary for wakeup detection.
Table 25. M1 Bit Mode
M1
0
1
Mode
Single Data pattern
Double Data pattern
9.5.3
M2, M3 (Zero-Half-Bit Detection Mode)
Bits M2 and M3 select the number of Zero-Half-bits that are allowed to be invalid. A high level of allowed invalid Zero-Half-bits increases the error
tolerance related to noise or interference’s, that means that the probability for the detection of a valid WAKE pattern increases. Note that in turn
the immunity against parasitic wakeups (WAKE detection when no data has been sent, due to noise or interference’s) is reduced.
Table 26. M2, M3 Bit Mode
9.5.4
M2
0
1
0
1
M4 (Detector Time Constant)
M3
0
0
1
1
WAKE Pin Function
3 invalid Zero-bits allowed
2 invalid Zero-bits allowed
1 invalid Zero-bits allowed
0 invalid Zero-bits allowed
Bit M4 is used to switch between a large and a small τ of the detector threshold adoption filter. A large τ is recommended, because it increases
the noise margin. A small τ can be used to improve the wake sensitivity when non-specified wake-patterns are used.
Table 27. M4 Bit Mode
M4
0
1
Mode
small τ
large τ
9.5.5
M5
Not used; must always be programmed to 0 by the user!
www.austriamicrosystems.com/AS3931
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