DS90UB949-Q1: Some questions about GPIOs of DS90UB949-Q1 with DS90UB948-Q1.

Went Cao

Part Number: DS90UB949-Q1
Other Parts Discussed in Thread: DS90UB948-Q1

Dear All

I will use DS90UB949-Q1 for Serializer, and use DS90UB948-Q1 for Deserializer.

1.Configured the GPIO0 (14pin) of UB949 to output, configured the GPIO0 (7pin) of UB948 to input. If the high voltage signal send to the GPIO0 of UB948, the GPIO0 of UB949 will output high voltage ?without any software configuration ?

2.The GPIO0 of UB949 corresponds to GPIO0 of UB948 ? The GPIO1 of UB949 corresponds to GPIO1 of UB948 ? Can I configure GPIO0 of UB949 corresponds to GPIO1 of UB948 by configured the register ?

3. For the D_GPIO[3:0] and GPIO[3:0], can I conclude that there are just supported different speed, and other functions are same?

4. The GPIO_REG[5:8] only read by configured the register ?

over 7 years ago

0 Steven(Shenzhen) Shi over 7 years ago

TI__Mastermind 30515 points

Hi Went,
thanks for message. Could you please check the d/s on GPIO setting clearly? all your questions can get answers from d/s, thanks.
if any unclear, pls let's know.

best regards,
Steven

0 Went Cao over 7 years ago in reply to Steven(Shenzhen) Shi

Genius 5550 points

Dear Steven
I check it, but it can't give me explain clearly,like question 1:
The datasheet just tell me "In normal operation, GPIO[3:0] may be used as general purpose IOs in either forward channel (outputs) or back
channel (inputs) mode.",but didn't tell as forward channel (outputs) ,whether or not to configure GPIO[3:0] always. Need it be configured only one time when power on?
So,could you reply yes or no for my questions ?
Thanks a lot.

0 Steven(Shenzhen) Shi over 7 years ago in reply to Went Cao

TI__Mastermind 30515 points

Pls refer to section 8.3.1 table1, it lists how to use GPIOI in the FC and BC mode. thanks.

regards,
Steven

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DS90UB949-Q1: Some questions about GPIOs of DS90UB949-Q1 with DS90UB948-Q1.