cx28500 Mindspeed Technologies, cx28500 Datasheet - Page 53

• Manufacturer Part Number: cx28500
• Description: Cx28500 Multichannel Synchronous Communications Controller
• Manufacturer: Mindspeed Technologies

2.2
The serial line processors (RSLP and TSLP) service the bytes in the receive and transmit path. The SLP
coordinates all byte-level transactions between SIU and DMA. The SLP also interacts with the INTC to notify the
Host of events and errors during the serial line processing.
The RSLP main functions are the following:
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The TSLP main functions are the following:
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28500-DSH-002-C
HDLC mode handling
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Transparent mode
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Bit polarity inversion
Handle channel activation/deactivation
Handle OOF/COFA and overflow
Invert incoming data
Handle subchanneling
Interrupts
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HDLC mode handling
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Transparent mode
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Handle channel activation/deactivation
Handle COFA and under-run
Invert outgoing data
Handle subchanneling
Interrupts
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Search opening and closing flag (7Eh)
Abort detection (7Fh)
Check max/min message length
Verify byte alignment
Check FCS
Detect change of pad-fill
Zero deletion
Start to receive data from the first time slot assigned to the logical channel
BUFF, SHT, CHIC, CHABT
Generate opening/closing /shared flag (7Eh)
Zero insertion after five consecutive 1 s bit-stuffing
Generate FCS depending upon the protocol
Handle CTS
Generate pad fill between frames
Start to transmit data from the first time slot assigned to the logical channel
Generate pad fill between messages
BUFF, and EOM
Serial Line Processor (SLP)
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Internal Architecture
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