DS90C385A: [AN-1127] Check the Data Mapping.

Louis Han15

Genius 4680 points

Other Parts Discussed in Thread: DS90C385A

Hello

Data mapping in AN-1127 document is different from datasheet.

In the document AN-1127, R0 is mapped to Txin27, but is mapped to Txin0 in the datasheet.

Please Can you check the data Mapping for correct?

Regards.

over 8 years ago

0 Ikechukwu Anyiam over 8 years ago

TI__Mastermind 35130 points

Hi Louis,

The only way to determine whether the mapping is correct is to check what mapping the panel you're using expects. The mapping in the appnote corresponds to panels that expect JEIDA mapping, where the LSBs are mapped to the 4th LVDS data line. This is not a requirement though; you can map the data however you want depending on the panel. Can you share the datasheet of the panel?

Also, what page did you find that signal mapping on the DS90C385A datasheet? I can't seem to find it.

Regards,
I.K.

0 Louis Han15 over 8 years ago in reply to Ikechukwu Anyiam

Genius 4680 points

Hi I.K.

You will find it in DS90C385A DataSheet 6 Page.(AC Timing Diagrams)

I attached the datasheet of the panel.

回__EJ101IA-01G Final spec V06_20160923.pdf

Regards.

0 Ikechukwu Anyiam over 8 years ago in reply to Louis Han15

TI__Mastermind 35130 points

Hi Louis,

Below is the mapping you should use for your panel:

Pin Name	Signal
TxIN0	R0
TxIN1	R1
TxIN2	R2
TxIN3	R3
TxIN4	R4
TxIN6	R5
TxIN27	R6
TxIN5	R7

TxIN7	G0
TxIN8	G1
TxIN9	G2
TxIN12	G3
TxIN13	G4
TxIN14	G5
TxIN10	G6
TxIN11	G7

TxIN15	B0
TxIN18	B1
TxIN19	B2
TxIN20	B3
TxIN21	B4
TxIN22	B5
TxIN17	B6
TxIN23	B7
TxIN26	DE

You can leave TxIN24 and TxIN25 floating. Let me know if you have any more questions.

Regards,

I.K.

0 Ikechukwu Anyiam over 8 years ago in reply to Louis Han15

TI__Mastermind 35130 points

Hi Louis,

Actually, it'd be better to tie any unused inputs to ground instead of leaving them floating.

Regards,
I.K.

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DS90C385A: [AN-1127] Check the Data Mapping.