El circuito integrado HT48E06 de Holtek (www.holtek.com) consiste en un decodificador de saltos (Hopping Decoder) destinado a la decodificación de datos, datos clave y datos rodantes en sistemas digitales de Telecom (2007).

Utiliza el algoritmo de descodificación de encriptación DES24. Cada vez que se pulsa la clave del Hopping Encoder, los datos que ruedan se incrementarán de 1, y cada vez que recibe una clave, se incrementará de 1. El HT48e06 se utiliza en esta aplicación como el controlador.

Las principales características de este componente son:

 

Formatos de código:

- Todos los formatos

  

Código de código + idata (24 bits) _ hdata (24 bits)

- Lead Code

 

  Parte baja (8,90 ms) + parte alta (4,48 ms)

- idata (24 bits)

 

Datos de dirección (20 bits) + datos de la clave de estado (4 bits)

- idata (24 bit) y hdata (24 bit)

 

  lógica 0

  Parte baja (560 us) + parte alta (560 us)

 

  lógica 1

  Parte baja (560 us) + parte alta (1,68 ms)

- Código de repetición

  Parte baja (8,96 ms) + parte alta (2,24 ms) + parte baja (560 us)

 

En la figura 1 tenemos un circuito práctico de aplicación.

 


 

 

El programa para ese circuito puede ser descargado directamente del sitio de Holtek, buscando el documento PDF ha0093t.

 

 

 

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