DRA77P: SYSBOOT and another function: design consideration

AClemotte

Part Number: DRA77P

Hi,

Pinmux has suggested me that I use the SYSBOOT pins for video output. I have searched for alternatives but I have not found a way not to use these pins. My question is whether we have to have some kind of design consideration in these lines shared between the VOUT and SYSBOOT.

over 5 years ago

0 Alex Bashkov over 5 years ago

TI__Genius 13425 points

Hello,

This configuration should be fine. These pins are sampled only during the setup and hold time after PORz is de-asserted high. You just have to make sure there is no VOUT interference on these pins during PORz.

For details refer to the device Data Manual and Technical Reference Manual chapter (Initialization).

Thanks,

Alex

0 Stanislav Stilyanov over 5 years ago in reply to Alex Bashkov

TI__Genius 17750 points

Hi,

Normally sysboot pins are pulled high/low via 10-k resistors (value not critical). During run time, VOUTs will not be interfered by 10-k resistors due to the high resistance.

Regards,

Stan

0 AClemotte over 5 years ago in reply to Stanislav Stilyanov

Expert 1060 points

OK, great. Thanks

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DRA77P: SYSBOOT and another function: design consideration