参数资料
型号: CB-ACC-27
厂商: ConnectBlue
文件页数: 52/58页
文件大小: 510K
描述: ANTENNA 1/2WAVE 2.4GHZ 10CM U.FL
标准包装: 1
天线类型: 鞭状:1/2 波,偶极
频带数目: 1
频率: 2.4GHz
增益: 2dBi
端子: U.FL(IPEX)
安装类型: 底座安装
高度(最大): 4.25"(108mm)
包装: 散装
产品目录页面: 558 (CN2011-ZH PDF)
其它名称: 809-1000
 
 
 
 
 
 
 
Version 1.17  2011-09
52
 
A.2.2.4 External RS422/RS485 transceiver
A complete RS422/RS485 transceiver design connected to a bus system need to control the
enable signals of the transceiver. The SerialSelect signals are used for this purpose (see
Table 21).
The module need to be software configured to the corrected interface, see the Serial Port
Adapter AT Commands document how to configure the module to the correct serial inter-
face.
The Red/Mode pin is not allowed to be pull-down when using the SerialSelect signals (see
section 2.2).
Table 21: SerialSelect signals combinations
Serial
Select-0
Serial
Select-1
RS485/RS422 Transmitter
status (Active high)
RS485/RS422 Receiver
status (Active low)
0
0
Disabled
Enabled
0
1
Enabled
Enabled
1
0
Enabled
Disabled
1
1
Disabled
Disabled
 
 
 
Figure 18: A complete RS422/RS488 transceiver design.
 
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