General
Review and verify the following for
the custom schematic design:
- Above section including
relevant application notes and FAQ links
- Pin connectivity requirements (during reset, RX
buffers are enabled. A pull 4.7kΩ is recommended
irrespective of IO configuration), pin attributes
and signal description
- Electrical characteristics
(fail-safe operation and slew rate requirements when pulled to 3.3V), timing
parameters and any additional available information including
exceptions
- RC at the input of the
open-drain IOs for slew rate control when pulled to 3.3V
- Attached device address pin
connected to IO supply through a resistor (>1kΩ)
Schematic Review
Follow the below list for the custom
schematic design:
- WKUP_I2C0 and MCU_I2C0
controllers have dedicated I2C compliant open-drain output type buffers
- Verify the pullup values
used. Compare with the SK schematics or calculate based on the load
- The I2C pullup supply
amplitude connected follows the steady-state maximum voltage at all
fail-safe IO pins requirements. The supply threshold depends on the supply
voltage connected to IO supply group
- Provision for RC to control
slew rate and RC values
- Processor IO supply group
VDDSHVx and the attached device IO sourced from the same supply
- Supply rails connected follow
the ROC
Additional
- Verify the design recommendations
as per the data sheet or EVM implementation have been considered for the
attached device
- Review the Timing and
switching characteristics, I2C Exceptions section of the data
sheet during the design stage