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参数资料
| 型号： | AS3932-BTST |
| 厂商： | ams |
| 文件页数： | 22/34页 |
| 文件大小： | 0K |
| 描述： | IC RF PROGRAM 16-TSSOP |
| 标准包装： | 1 |
| RF 型： | 读/写 |
| 频率： | 110kHz ~ 150kHz |
| 特点： | 配有 RSSI |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 805 (CN2011-ZH PDF) |
| 其它名称： | AS3932-BTSTDKR |
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AS3932
Datasheet - D e t a i l e d D e s c r i p t i o n
Note: These times are minimum required, but it is recommended to prolong the preamble.
The comparator of the data slicer can work only with positive or with symmetrical threshold ( R3<6> ). In addition the threshold can be 20 or 40
mV ( R3<7> )
In case the length of the preamble is an issue the data slicer can also work with an absolute threshold ( R1<7> ). In this case the bits R3<2:0>
would not influence the performance. It is even possible to reduce the absolute threshold in case the environment is not particularly noisy
( R2<7> ).
8.5 Correlator
After frequency detection the data correlation is only performed if the correlator is enabled ( R1<1> =1).
The data correlation consists of checking the presence of a preamble (ON/OFF modulated carrier) followed by a certain pattern.
After the frequency detection the correlator waits 16 bits (see bit rate definition in Table 19 ) and if no preamble is detected the chip is set back to
listening mode and the false wake-up register ( R13<7:0> ) is incremented by one.
To get started with the pattern correlation the correlator needs to detect at least 4 bits of the preamble (ON/OFF modulated carrier).
The bit duration is defined in the register R7<4:0> according to the Table 19 as function of the Real Time Clock (RTC) periods.
Table 19. Bit Rate Setup
R7<4>
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
R7<3>
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
R7<2>
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
R7<1>
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
R7<0>
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Bit duration in RTC
clock periods
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Bit rate (bits/s)
8192
6552
5460
4680
4096
3640
3276
2978
2730
2520
2340
2184
2048
1926
1820
1724
1638
1560
1488
1424
1364
1310
1260
1212
1170
1128
Symbol rate (Manchester
symbols/s)
4096
3276
2730
2340
2048
1820
1638
1489
1365
1260
1170
1092
1024
963
910
862
819
780
744
712
682
655
630
606
585
564
www.ams.com/LF-Receiver/AS3932
Revision 1.7
22 - 34
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