MPC8280 datasheet(1232/1386 Pages) FREESCALE

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ATM Transmission Convergence Layer

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

35-16

Freescale Semiconductor

required ATM parameters and data structures have been setup and initialized, implementing a T1

application requires the following steps:

1. Program FCC2

2. Setup I/O Ports and Clocks

3. Enable Tx/Rx on FCC2

4. Program CPM MUX

5. Program the TC block

6. Program the Serial Interface (SI)

7. Enable TDM

Step 1

To setup and initialize FCC2, program the FPSMR and GFMR as shown in Table 14. This is for working

with one TC block operating in a single PHY environment. The transmitter and receiver should not be

enabled at this time. In this example, FCC2 does not discard idle cells.

Step 2

Because the FCC2 UTOPIA bus is connected internally to the TC UTOPIA bus, program the parallel ports

and BRGs for the active TDM(s).

Step 3

To enable receiving and transmitting, FCC2 should be programmed as shown in Table 15.

Step 4

To define the connection of FCC2, the CPM MUX should be programmed as shown in Table 16.

Table 35-9. Programming the CPM MUX for a TI Application

Table 35-7. Programming GFMR and FPSMR to Setup the FCC2

Init Values

Description

FPSMR2 = 0x0080_0000

UTOPIA Rx and Tx in Master Mode, Idle cells are not discarded

GFMR2 = 0x0000_000A

ATM Protocol Mode, Receiver and Transmitter are disabled

Table 35-8. Enable FCC2

Init Values

Description

GFMR2 = 0x0000_003A

Enable Rx and Tx

Init Values

Description

CMXFCR = 0x0080_0000

FCC2 is connected to the TC Layer

CMXUAR = 0x0000

FCC2 as UTOPIA master

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