General
Review and verify the following for
the custom schematic design:
- Reviewed above "Common checklist for all sections" section of the
user's guide.
- Connection of the OLDI0 interface signals with attached devices.
- Marking of differential signals and the differential impedance (100Ω) value.
- Configuration of interface termination.
- Connection of supply rail and addition of capacitors.
- Implementation of attached device logic.
- OLDI0 interface when not used.
Schematic Review
Follow the below list for the custom
schematic design:
- Supply rail connected to the OLDI0 interface peripheral rail on the processor
and the attached device IO supply are sourced from the same supply and follow
the ROC.
- Connection of OLDI0 signals x2 OLDI-SL single-link or x1 OLDI-DL dual-link
display mode (supports can be configured only mirrored (duplicate, due to
internal hardware support/configuration) mode).
- Configuration of the required terminations (internal to the processor or
attached devices).
- Connection of the OLDI0 interface signals with attached devices including the
polarity of the signals.
- The recommendation is to implement the attached device (OLDI module) reset using
a 2-input ANDing logic. Processor GPIO is connected as one of the input to the
AND gate with provision for pullup or pulldown (pullup enabled) near to the
ANDing logic AND gate input and provision for 0Ω to isolate the GPIO output for
testing or debug. The other input to the AND gate is the MAIN domain warm reset
status output (RESETSTATz).
- When OLDI0 interface is not used, connection of the recommended power supply and
signals as per the pin connectivity requirements.
Additional
- The recommendation is to provision for external
ESD protection (based on the use case).
- When OLDI0 display interface is configured for
dual-link display mode, there are "Odd/Even" requirements (for pixels). Data
lanes A0, A1, A2, A3 correspond to Odd pixels and data lanes A4, A5, A6, A7
correspond to the Even pixels.
- When OLDI0 interface is configured for x2
single-link display mode, the OLDI0 interface supports (can be configured) only
mirrored (duplicate, due to internal hardware support/configuration) mode.