MPC8280 datasheet(1201/1386 Pages) FREESCALE

1201 / 1386 page

Inverse Multiplexing for ATM (IMA)

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

34-55

34.5.3.2

General Operation

•

React to received ICP cells. ICP cells are only received when their SCCI field changes, except the

first received ICP cell

•

Report any NE and FE timing mode mismatches (ITC vs. CTC) to the Unit Management

34.5.3.3

Receive Link State Machine Control

•

Set up unassigned links, awaiting ICP cells

— Define either as standard multi-PHY or as unassigned IMA link

— Set up receive channel for ICP OAM cells for this link only

•

Create and initialize delay compensation buffer

•

Respond to received ICP cells. Extract and validate link/group parameters

—IMA ID

— Link ID

— Link ICP offset

— IMA frame size (M)

•

After establishment of group, change receive channel for ICP OAM cells such that all links in the

group point to the same channel

•

Control link operation (via ILRCTNL[RXSC]) in coordination with link and group states

34.5.3.4

Receive Group State Machine Control

•

Coordinate receive links, using received ICP cells to identify a proposed group

•

Establish and validate group parameters in conjunction with the received link states and parameters

— IMA version

—IMA ID

— Group order table

•

Enable delay synchronization for the group, and react to its completion

•

Control group operation (via IGRCNTL[RXSC]) in coordination with group state

•

Signal receive group state via ICP cells of corresponding transmit group

34.5.3.5

Transmit Link State Machine Control

•

Define the IMA link

— Define link parameters (e.g. IMA ID, Link ID, IMA frame size (M)) in coordination with IMA

group definition

— Assign ICP offset

— Create and initialize transmit queue

•

Control link operation (via ILTCNTL[TXSC]) in coordination with link and group states

MPC8280 Datasheet(PDF) 1201 Page - Freescale Semiconductor, Inc

MPC8280 Datasheet(HTML) 1201 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL