MPC8280 datasheet(1167/1386 Pages) FREESCALE

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Inverse Multiplexing for ATM (IMA)

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

34-21

Figure 34-12. IMA Root Table Data Structures

The IMA data structures are organized as follows:

•

Parameters at the FCC level determine common ATM parameters and location of the IMA Root

Table

•

IMA Root Table includes parameters that are used by all IMA links of this FCC

•

IMA Group Receive Table and IMA Group Transmit Table entries include parameters that define

the receive and transmit states and settings of the associated IMA group

•

IMA Link Receive Table and IMA Link Transmit Table entries include parameters that define the

receive and transmit states and settings of the associated IMA link

•

Optional IDCR Table that contains IDCR timers for the IMA groups

Filler Cell Template

Transmit Queue Info

IMA Control Parameter

PHY Management

IMAEXTBASE

IMAGRPT_TX

IMAGRPT_RX

IMALINKT_TX

IMALINKT_RX

IRLINKSTAT

IMA Data Structures

External memory

Group 0

Group 7

IMA Group Tx Table

Group 0

Group 7

IMA Group Rx Table

Link 0

Link 31

IMA Link Tx Table

Link 0

Link 31

IMA Link Rx Table

DCBs, TX Queue

(Local or 60x Bus)

must be aligned to

1MByte Boundary.

IMA Root Table

IMA Link Receive

Internal DPRAM

IDCR param.

(Optional)

IDCR Table

IMA Root Table

Statistics Table

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