MPC8313ECZQADDC Freescale Semiconductor, MPC8313ECZQADDC Datasheet - Page 877
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MPC8313ECZQADDC
Manufacturer Part Number
MPC8313ECZQADDC
Description
Microprocessors - MPU 8313 REV2.2 PB ENC EXT
Manufacturer
Freescale Semiconductor
Datasheet
1.MPC8313CZQADDC.pdf
(1214 pages)
Specifications of MPC8313ECZQADDC
Processor Series
MPC8313E
Core
e300
Data Bus Width
16 bit
Maximum Clock Frequency
133 MHz
Program Memory Size
16 KB
Data Ram Size
16 KB
Interface Type
I2C
Mounting Style
SMD/SMT
Package / Case
PBGA
Number Of Programmable I/os
32
Number Of Timers
4
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Reception errors are described in
Freescale Semiconductor
Overrun error
Busy error
Filed frame to invalid
queue error
Parser error
Non-octet error
(dribbling bits)
Late collision
Memory read error
Data parity error
Babbling transmit error
Error
Error
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
The Ethernet controller maintains an internal FIFO buffer for receiving data. If a receiver FIFO buffer
overrun occurs, the controller sets RxBD[OV], sets RxBD[L], closes the buffer, increments the
discarded frame counter (RDRP), and sets IEVENT[RXF], The receiver then enters hunt mode
(seeking start of a new frame).
A frame is received and discarded due to a lack of buffers. The controller sets IEVENT[BSY] and
increments the discarded frame counter (RDRP). In addition, the RSTAT[QHLT n ] bit is set. RDRP
increments for each frame that is received while the receiver is halted due to a busy condition. The
halted queue resumes reception once the RSTAT[QHLT n ] bit is cleared.
A frame is received and discarded as a result of the filer directing it to an RxBD ring that is currently
not enabled. The controller sets IEVENT[FIQ] and increments the discarded frame counter (RDRP).
If the receive frame parser is enabled, a parse error can be flagged as a result of inconsistencies dis-
covered between fields of the embedded packet headers. For example, the L2 header may indicate
an IPv4 header, but the IP version number fails to match. In the event of a parse error, parsing is ter-
minated at the inconsistent header, and the RxFCB[PERR] field indicates at which layer of the proto-
col stack the error was discovered. Receiver function continues regardless of parse errors, but
IEVENT[PERR] is set. The receive queue filer may operate with reduced or default information in
some cases; therefore, filer rule sets should be constructed so as to be tolerant of misformed frames.
Note: Any values in the length/type field between 1500 and 1536 is treated as a length, however, only
illegal packets exist with this length/type since these are not valid lengths and not valid types. These
are treated by the MAC logic as out of range.
Software must confirm the parser and filer results by checking the type/length field after the packet has
been written to memory to see if it falls in this range.
The Ethernet controller handles a nibble of dribbling bits if the receive frame terminates as non-octet
aligned and it checks the CRC of the frame on the last octet boundary. If there is a CRC error, the
frame non-octet aligned (RxBD[NO]) error is reported, IEVENT[RXF] is set, and the alignment error
counter increments. The eTSEC relies on the statistics collector block to increment the receive
alignment error counter (RALN). If there is no CRC error, no error is reported.
The controller terminates buffer transmission, sets TxBD[LC], closes the buffer, IEVENT[LC], and
IEVENT[TXE]. The controller resumes transmission after TSTAT[THLT] is cleared (and
DMACTRL[GTS] is cleared).
A system bus error occurred during a DMA transaction. The controller sets IEVENT[EBERR], DMA
stops sending data to the FIFO which causes an underrun error, and therefore TxBD[UN] is set, but
IEVENT[XFUN] is not set. The TSTAT[THLT] is set. Transmits are continued once TSTAT[THLT] is
cleared.
Data in the transmit FIFO was potentially corrupted. The controller sets IEVENT[DPE], but otherwise
continues transmission until halted explicitly.
A frame is transmitted which exceeds the MAC’s Maximum Frame Length and
MACCFG2[Huge Frame] is a 0. The controller sets IEVENT[BABT] and continues without interruption.
Table 15-150. Transmission Errors (continued)
Table
Table 15-151. Reception Errors
15-151.
Description
Response
Enhanced Three-Speed Ethernet Controllers
15-159
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