MPC8280 datasheet(566/1386 Pages) FREESCALE

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Communications Processor Module Overview

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

14-16

Freescale Semiconductor

INIT TX PARAMS

Initialize transmit parameters. Initializes the transmit parameters of the peripheral controller. Note

that for the MCCs, issuing this command initializes only 32 channels at a time; see Section 29.7,

“MCC Commands.”

INIT TX PARAMS

—

ONE CHANNEL

Initialize MCC transmit parameters for only a single channel according to MCC channel number

field. See Section 29.7, “MCC Commands.”

ENTER HUNT

MODE

Enter hunt mode. Causes the receiver to stop receiving and begin looking for a new frame. The exact

operation of this command may vary depending on the protocol used.

STOP TX

Stop transmission. Aborts the transmission from this channel as soon as the transmit FIFO has been

emptied. It should be used in cases where transmission needs to be stopped as quickly as possible.

Transmission proceeds when the RESTART command is issued.

GRACEFUL STOP

Graceful stop transmission. Stops the transmission from this channel as soon as the current frame

has been fully transmitted from the transmit FIFO. Transmission proceeds when the RESTART

command is issued and the R-bit is set in the next TxBD.

RESTART TX

Restart transmission. Once the STOP TX command has been issued, this command is used to

restart transmission at the current BD.

CLOSE RXBD

Close RxBD. Causes the receiver to close the current RxBD, making the receive buffer immediately

available for manipulation by the user. Reception continues using the next available BD. Can be

used to access the buffer without waiting until the buffer is completely filled by the SCC.

START IDMA

See Section 19.9, “IDMA Commands.”

STOP IDMA

See Section 19.9, “IDMA Commands.”

SET TIMER

Set timer. Activates, deactivates, or reconfigures one of the 16 timers in the RISC timer table.

SET GROUP

ADDRESS

Set group address. Sets a bit in the hash table for the Ethernet logical group address recognition

function.

GCI ABORT

REQUEST

GCI abort request. The GCI receiver sends an abort request on the E-bit.

GCI TIMEOUT

GCI time-out. The GCI performs the timeout function.

RESET BCS

Reset block check sequence. Used in BISYNC mode to reset the block check sequence calculation.

MCC STOP

TRANSMIT

See Section 29.7, “MCC Commands.”

MCC STOP

RECEIVE

See Section 29.7, “MCC Commands.”

MCC RESET

MCC reset. Provides a hard reset to the MCC FIFOs. See Section 29.7, “MCC Commands.” To use

this command, software should execute the following sequence:

1 Disable the TDM by clearing the appropriate enable bit in SIxGMR[4-7] (See Table 14-4,

“SIxGMR Field Descriptions.”).

Issue the MCC RSET command.

Issue the INIT RX AND TX command.

4 Reprogram the specific MCC channel, global parameters, and any BDs that need to be updated.

Set the appropriate enable bit in SIxGMR[4-7]. (See Table 14-4, “SIxGMR Field Descriptions.”).

ATM TRANSMIT

See Section 31.14, “ATM Transmit Command.”

Table 14-8. Command Descriptions (continued)

Command

Description

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