I have asked this inside another topic but i think it's better to ask this in a seperate discussion.
I am trying to power down and then up ADV7188 via PWRDN pin.
power down is successfull
power up is successfull
reset after power up looks good.
i see H-V-F signals running.
But configuration over I2C fails after that.
if i don't use pwrdn pin and let the device always work, can reset the device and configure successfully but. if there is a power down-up by pwrdn pin, configuration fails. (recieve NACK)
What should be the PWRDN-RESET-OE sequence and timing from the start-up and when needed while running?
What can be the problem?
Thanks and Best Regards..
Hey Guys, Please Help ! I'm stuck here.
Note: i've seen power up time as 20 ms and applied before reset but nothing changed. Also applied pwrdn and reset together but nothing changed. apllied wait 5 ms- reset for 5 ms- wait 5 ms and then start configuration - but nothing changed. (also i increased these time intervals as well as 100 ms but nothing changed.) By the way, i am monitoring the signals by logic analyzer and all of them looks ok, as i've programming fpga code.
- is there a power-up sequence for 7188? i see this for other products and on their datasheets but on adv7188's daatsheet, nothing is written.
- what should be pwrdn-reset-oe-sda-scl sequence from start up and after runtime power on-off ??
Please Help !.. I'm getting crazy !..