Troubleshooting Miss-Match Error in Serial Boot Communication
A miss-match error occurs during serial boot communication, causing normal communication to fail. Learn about the phenomenon, possible causes, and comparisons of waveform data from different lots. Explore solutions to resolve miss-match errors impacting UART Boot Host via RS232C Serial Port.
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Presentation Transcript
1. lot : CNQG A. 0x41504954 transmitted from DSP to UART Boot Host (TI's SW) via RS232C Serial Port at Power On B. If a miss-match occurs, the error ends. 2. Phenomenon A. A miss-match error occurs during serial boot communication B. Normal communication normal (Receive side 1ST byte error at power on)
- - When I turned on the power From TRS3221 TxD Out Port(Pin13) One Pulse Output UART Boot Host recognizes as RS232C specification communication Start Bit and causes a Miss-Match Error TxD Input Port(Pin11) +3.3V Power TxD Output Port(Pin13) < TRS3221EI CNQG Lot > EN, FORCEOFF# Pin -> +3.3V, FORCE ON Pin -> Logic
- C7KV Lot Waveform for Comparison TxD Input Port(Pin11) +3.3V Power TxD Output Port(Pin13) < TRS3221EI C7KV > EN, FORCEOFF# Pin -> +3.3V, FORCE ON Pin -> Logic
- MAX3221E Waveform for Comparison TxD Input Port(Pin11) +3.3V Power TxD Output Port(Pin13) < MAX3221E> EN, FORCEOFF# Pin -> +3.3V, FORCE ON Pin -> Logic
