DS90UB925Q-Q1: Clarification of GPIO and GPO pins.

Daniel Rechichi

The data-sheet for DS90UB925Q-Q1 implies that GPIO[3:0] pins 36, 35, 26, 25 are capable of being outputs on the '925 serializer. Can you confirm that this is correct? Are they driven from data carried in the LS_BC or is my understanding incorrect?

The datasheet also implies that GPO_REG[8:6] (I2S_CLK / WC / DA) pins 13, 12, 11 are only capable of being outputs but the application note for enabling GPIOs implies that they are capable of also being inputs (page 3). Can you please confirm that this correct?

Application note from the DS90UB925Q-Q1 technical documents:

http://www.ti.com/lit/an/snla234/snla234.pdf

over 8 years ago

0 Steven(Shenzhen) Shi over 8 years ago

TI__Mastermind 30515 points

Hi Daniel,

pls follow up d/s description.

for gpio pins, due to some reused they can't work in the same time so you need detect it and use them correctly.

Fot gpio-reg, the point in app. note is that you can trasmit gpio signal like I2S, in this state, the gpio-reg pins also can be used as gpio signal transmission.

best regards,

Steven

0 Steven(Shenzhen) Shi over 8 years ago

TI__Mastermind 30515 points

If you check the pinout of UB925 in d/s page, pin36/35 etc. can be used as GPO when UB925 works at 18bits mode, otherwise it is conflicted with video data pins (G1/G0...).

regards,
Steven

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DS90UB925Q-Q1: Clarification of GPIO and GPO pins.