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参数资料
| 型号： | LICAL-TRC-MT |
| 厂商： | Linx Technologies Inc |
| 文件页数： | 7/44页 |
| 文件大小： | 0K |
| 描述： | IC TRANSCODER MT BI-DIR 20-SSOP |
| 特色产品： | MT Series Transcoder |
| 标准包装： | 1 |
| 系列： | MT |
| 类型： | 数据代码转换器 |
| 应用： | 警报系统，通信系统 |
| 电压 - 电源，模拟： | 2.0 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 标准包装 |
| 其它名称： | LICAL-TRC-MTDKR |
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11
Transcoder Operation
When the transcoder powers on for the first time, it is in a default set-up.
When in this mode, the transcoder looks at the state of the ENC_SEL line
on powerup. If the line is high, then the transcoder enters Default Encoder
Mode and acts like an encoder only. It pulls the TR_SEL line high to set the
transceiver into transmit mode and makes all of its status lines inputs. It will
use a default address that is set at the factory.
If the ENC_SEL line is low, then the transcoder enters Default Decoder
Mode and acts like a decoder only. It pulls the TR_SEL line low to set the
transceiver into receive mode and makes all of its status lines outputs. At
this point, the User Access is open, so the transcoder accepts all valid
transmissions, regardless of address. This allows the designer to set up an
external database for learned users and control permissions. The designer
is free to set up a system of their choosing. External parts can be used
with the transcoder to give the end product more memory to increase the
number of users and more processing speed have a faster response time
when scanning through the user list. In this mode, the transcoders become
a data pipe around which a designer can create a larger, more complicated
system than can be implemented with the transcoders alone.
The User Access can be locked simply by learning a user. From this point
on, it requires that the transmission have a valid, learned address before it
will respond. Only a Restore Default commend sent on the serial interface
will place the transcoder back into Default Decoder Mode. This command
removes all existing settings and restores the transcoder to the factory
default condition.
Once an address has been created, the transcoder enters a Defined
set-up. The state of the ENC_SEL on power-up also determines the mode
of operation in this set-up. If the ENC_SEL line is high, the transcoder
enters Defined Encoder Mode. The process of creating an address also
defines which status lines are inputs and which are outputs. In this mode,
the transcoder acts as an encoder only using just the defined inputs and
the address that was created.
If the ENC_SEL line is low, the transcoder enters Transcoder Mode and
uses both the inputs and outputs as well as the defined address. In this
mode, it can send commands as well as receive commands. As above, the
User Access is open until a user is learned into memory.
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