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Altera_Forum's avatar
Altera_Forum
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15 years ago

SD-SDI 8bit

Hello, SD-SDI megacore supports SD-SDI 10bit mode, however I need 8 bit support. Is it possible to use 8bit mode or it will be impossible to sync the signal? If two LSB bits will be left unconnect...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi,

The SDI standard is requiring the support for both 10bit and 8 bit equipment.

For example the synchronization words:

" Each timing reference signal consists of a four-word sequence in the following format:

3FFh 000h 000h XYZh

Because of the existence of both 8- and 10-bit equipment, for detection purposes all values in the ranges 000h-003h and 3FCh-3FFh must be considered equivalent to 000h and 3FFh, respectively."

Since Altera declare that the SDI IP is compatible to the standard, probably they support both 8- and 10-bit equipment.

BR,