MT312C ZARLINK [Zarlink Semiconductor Inc], MT312C Datasheet - Page 29

• Manufacturer Part Number: MT312C
• Description: Satellite Channel Decoder
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

MT312
DiSEqC Control
5 DiSEqC Control
5.1 Screen Printouts of DiSEqC™ Waveforms
Figure 20 - A DiSEqC™ data byte interrupting a continuous 22kHz tone
The timing periods of the 16ms before the data byte and 16ms afterwards to the interrupt being asserted are
clearly shown. The restoration of the 22kHz after the interrupt is controlled by software.
Figure 21 - One DiSEqC™ data byte - 0x11 (hex) plus parity bit
A 'zero' comprises 22kHz on for 1ms then off for 0.5ms. A 'one' comprises 22kHz on for 0.5ms then off for 1ms.
The ninth bit is an odd parity bit.
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