参数资料
型号: CB-ACC-27
厂商: ConnectBlue
文件页数: 54/58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
54
A.2.3.2 RED Signal
The RED logic LED signal is not multiplexed with any other functionality, which makes the
design more straightforward. See Figure 21 for a 3.3V design.
In a 5V system the high state output (2.8V) from the module is not enough to turn off the
LED so a 74HCT08 buffer can be used to raise the high level to 5V (see Figure 22).
The 74HCT08 gate is available in a single gate package (74AHCT1G08).
 
 
Figure 21: A red LED in a 3.3V host system. The
status of the signal can also be used as input to a
host controller.
Figure 22: A red LED in a 5V host system. The
status of the signal can also be used as input
to a host controller.
 
The RED signal pin is also used to select Logic Level mode (instead of RS232) for con-
nectBlue product with internal RS232 driver. The mode functionality is not applicable on cB-
0901 because there is no internal RS232 driver available. To be compatible with these prod-
ucts check the datasheet about this signal.
The Red signal is not allowed to be pull-down when using the SerialSelect signals for
RS485/RS422 (see A.2.2.4).
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