Core1553BRT-EBR Enhanced Bit Rate 1553 Remote Terminal
Error Detection
Table 11 • Error Detection
Error Condition
Action
Command Word
1. Parity or Manchester encoding errors
2. Incorrect SYNC waveform
Command is ignored
No interrupt generated
Mode Codes
1. Illegal mode code or invalid sub-address from internal or external MSGERR in SW is set, and SW is transmitted. Message Failure
legality block
interrupt generated
Broadcast Data Commands
1. TX bit set in command word
Data transfer is aborted. MSGERR in SW is set, and SW is not
transmitted. Message Failure interrupt generated
Data Word
1. Parity or Manchester encoding errors
2. Incorrect number of words received
3. Data words are continuous
4. Incorrect SYNC waveform
Data transfer is aborted
MSGERR in SW is set, and SW is not transmitted
Message Failure interrupt generated
Transmit Data Error
1. The RT monitors its transmissions on the bus through its decoder Data transfer is aborted. MSGERR in SW is set, and SW is not
and verifies that the correct data is transmitted with no Manchester transmitted. Message Failure interrupt generated
or parity errors.
Backend Failure
1. The RT makes sure that the backend responds to read and write Data transfer is aborted. MSGERR in SW is set, and SW is not
cycles within the required time.
transmitted. Message Failure interrupt generated
BUSY
1. Backend RTBUSY input is active at any point during the message.
Transmitter Overrun
Data transfer is aborted. BUSY in SW is set, and SW is
transmitted. Message Failure interrupt generated
1. Transmits for greater than 67 µs. The internal state machines Core shuts down transmissions on the bus
prevent this from happening, but the core includes the required
timer and functionality. This is implemented separately from the
encoder to provide complete protection.
16
Advanced v1.1
ACTEL [ Actel Corporation ]
