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4-98
Bits 7-5 - Reserved for future use.
FR -
Framing Error
A character with a framing error was received. The associated character
may be found at the last location in this buffer. A framing error is detected
by the UART controller when no stop bit is detected in the receive data
string.
NOTE
This error can occur only on asynchronous DDCMP links.
PR - Parity Error
A character with a parity error was received. The associated character may
be found at the last location in this buffer .
NOTE
This error can occur on!y on asynchronous DDCMP links.
CR - Rx CRC Error
A message with a CRC error was received in the header (CRC1) or data
(CRC2) fields or a control message (CRC3).
OV - Overrun
A receiver overrun occurred during message reception.
CD - Carrier Detect Lost
The CD signal was deasserted during message reception. This bit is valid
only when working in NMSI mode.
Data Length
The data length is the number of octets that the DDCMP controller has
written to this BD's data buffer.
NOTE
The actual buffer size should be greater than or equal to eight (to
ensure the header is received in one buffer).
Rx Buffer Pointer
This pointer contains the address of the associated data buffer and may
be even or odd. The buffer may reside in either internal or external memory.
MC68302 USER'S MANUAL
MOTOROLA
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