FlexRay Development Platforms | Cypress Semiconductor
FlexRay Development Platforms
List of Limitations about FlexRay Evaluation kit (MB2005-01)
About interrupts using Interrupt_A or Interrupt_B
There is an event to which an interrupt processing using Interrupt_A or Interrupt_B cannot be applied.
The Interrupt_A and Interrupt_B signals issued from the FlexRay main board requires 5V input "H" level voltage for the CPU board. However, depending on the board characteristics, the "H" level voltage for the CPU board cannot always be satisfied.
Adding a 1.2 KΩ pull-up resistor supplying 5 V from the CPU board to Interrupt_A, Interrupt_B, DEOP_0, or ULB_DREQ can solve this problem.
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