Freescale Semiconductor MPC8260 PowerQUICC II Family Reference Manual page 564

Communications Processor Module Overview
2
See FCC1 and FCC2 in SBC[6-10] in Table 13-6. Not available on the MPC8250.
If a reserved command is issued, the CPM enters an unknown state that
requires an external reset to recover.
The commands in Table 14-7
Command
Initialize transmit and receive parameters. Initializes the transmit and receive parameters in the
INIT TX AND RX
parameter RAM to the values that they had after the last reset of the CP. This command is especially
PARAMS
useful when switching protocols on a given peripheral controller.
Initialize receive and transmit parameters. Initializes the receive and transmit parameters of the
INIT MCC RX AND
TX — peripheral controller. Differs from INIT RX AND TX PARAMS in that, for the MCCs, issuing INIT RX
PARAMS
1
AND TX PARAMS initializes 32 consecutive channels beginning with the channel number specified
ONE CHANNEL
in CPCR[MCN], but issuing INIT MCC RX AND TX—ONE CHANNEL initializes only the channel in
the command; see
Initialize receive parameters. Initializes the receive parameters of the peripheral controller. Note that
INIT RX PARAMS
for the MCCs, issuing this command initializes only 32 channels at a time; see
Commands."
Initialize MCC receive parameters for only a single channel according to MCC channel number field.
INIT MCC RX
— See
PARAMS
1
ONE CHANNEL
Initialize transmit parameters. Initializes the transmit parameters of the peripheral controller. Note
INIT TX PARAMS
that for the MCCs, issuing this command initializes only 32 channels at a time; see
"MCC
— Initialize MCC transmit parameters for only a single channel according to MCC channel number
INIT TX PARAMS
1
field. See
ONE CHANNEL
Enter hunt mode. Causes the receiver to stop receiving and begin looking for a new frame. The exact
ENTER HUNT
operation of this command may vary depending on the protocol used.
MODE
Stop transmission. Aborts the transmission from this channel as soon as the transmit FIFO has been
STOP TX
emptied. It should be used in cases where transmission needs to be stopped as quickly as possible.
Transmission proceeds when the
Graceful stop transmission. Stops the transmission from this channel as soon as the current frame
GRACEFUL STOP
has been fully transmitted from the transmit FIFO. Transmission proceeds when the RESTART
TX
command is issued and the R-bit is set in the next TxBD.
Restart transmission. Once the STOP TX command has been issued, this command is used to
RESTART TX
restart transmission at the current BD.
Close RxBD. Causes the receiver to close the current RxBD, making the receive buffer immediately
CLOSE RXBD
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.
See
START IDMA
See
STOP IDMA
Set timer. Activates, deactivates, or reconfigures one of the 16 timers in the RISC timer table.
SET TIMER
14-16
are described in
Table 14-8. Command Descriptions
Section 28.7, "MCC
Section 28.7, "MCC Commands."
Commands."
Section 28.7, "MCC Commands."
Section 19.9, "IDMA Commands."
Section 19.9, "IDMA Commands."
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
NOTE
Table 14-8.
Description
Commands."
command is issued.
RESTART
Section 28.7, "MCC
Section 28.7,
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