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GR712RC
ing register has been read out by software, it should be masked in the interrupt controller to avoid
an immediate second interrupt).
• ‘Receiver overrun’ (generated when received data is dropped due to a reception overrun)
• ‘CLTU ready’ (note that this interrupt is also issued for abandoned CLTUs)
• FAR interrupt ‘Status Survey Data’
• CLCW interrupt ‘Bit Lock’
• CLCW interrupt ‘RF Available’
26.8 Miscellaneous
26.8.1 Numbering and naming conventions
Convention according to the CCSDS recommendations, applying to time structures:
• The most significant bit of an array is located to the left, carrying index number zero.
• An octet comprises eight bits.
Convention according to AMBA specification, applying to the APB/AHB interfaces:
• Signal names are in upper case, except for the following:
• A lower case 'n' in the name indicates that the signal is active low.
• Constant names are in upper case.
• The least significant bit of an array is located to the right, carrying index number zero.
• Big-endian support.
General convention, applying to all other signals and interfaces:
• Signal names are in mixed case.
• An upper case '_N' suffix in the name indicates that the signal is active low.
Table 204.CCSDS n-bit field definition
CCSDS n-bit field
most significant least significant
01 to n-2 n-1
Table 205.AMBA n-bit field definition
AMBA n-bit field
most significant least significant
n-1 n-2 down to 1 0
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