Micro Digital Satellite Receiver Manual de usuario descargar pdf (Pagina 11)

AN2677/D

Conclusion

Digital Satellite Equipment Control (DiSEqC ) using MC68HC908QT/QY 11

Conclusion

This application note explains the DiSEqC-control of low noise blocks in a

satellite receiver system and demonstrates the basic possibilities of a DiSEqC

slave unit. To achieve the basic properties of DiSEqC level 1.0, a member of

the low-cost and powerful small (8-pin) universal MCU MC68HC908QT4 series

can be used. In this case, pins 6 and 7 are available to be used in the function

control ports for the next two LNBs. To satisfy the demands of DiSEqC level 1.x

and 2.x, it’s possible to use a similar MCU from the higher pin count

MC68HC908QY4 series.

References AN2677SW.zip — from Motorola (http://motorola.com/semiconductors);

contains all software files and schematic for this application.

DiSEqC Bus Functional Specification V4.2 — from Eutelsat

(http://www.eutelsat.com)

MC68HC908QY4/D: MC68HC908QT4 Data Sheet — from Motorola

(http://motorola.com/semiconductors)

NOTE: With the exception of mask set errata documents, if any other Motorola

document contains information that conflicts with the information in the device

data sheet, the data sheet should be considered to have the most current and

correct data.

Freescale Semiconductor, I

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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Micro Digital Satellite Receiver Manual de usuario Pagina 11