cx28560 Mindspeed Technologies, cx28560 Datasheet - Page 255

• Manufacturer Part Number: cx28560
• Description: Hdlc Controller
• Manufacturer: Mindspeed Technologies

CX28560 Data Sheet
E.2.2
E.2.3
E.2.4
28560-DSH-001-B
Byte Message
Ending a Fragment with No End of Message
Not Ending a Fragment
This accumulation requires 32 bytes in the FIFO: 8 bytes for header and last bytes, 40
bytes for message that arrived (plus one FLAG byte). This time, the place for header
and last bytes is set aside because there are enough bytes for the closing FLAG of the
40-byte message to have arrived.
This accumulation requires 52 bytes in the FIFO.
This accumulation requires 44 bytes in the FIFO.
Hence, maximum number of FIFO bytes that a 42-byte in can require is 56 bytes.
40 B Mesg
56 B Fragment
Mindspeed Technologies™
42 B Accumulated Between Services
Advance Information
<56 B Fragment
1 B
42 B Accumulated Between Services
42 B Accumulated Between Services
40 B Mesg
41 B Fragment
Buffer Controller FIFO Size Calculation
101302_018
101302_019
101302_020
E
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5