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Part IV. Communications Processor Module
The commands in Table 13-7 are described in Table 13-8.
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 parameters. Initializes the receive parameters of the peripheral controller. Note that for
INIT RX
the MCCs, issuing this command initializes only 32 channels at a time; see Section 27.9, ÒMCC
PARAMS
Commands.Ó
Initialize transmit parameters. Initializes the transmit parameters of the peripheral controller. Note that
INIT TX
for the MCCs, issuing this command initializes only 32 channels at a time; see Section 27.9, ÒMCC
PARAMS
Commands.Ó
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 has
GRACEFUL
been fully transmitted from the transmit FIFO. Transmission proceeds when the RESTART command is
STOP TX
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
RESTART TX
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 Þlled by the SCC.
See Section 18.9, ÒIDMA Commands.Ó
START IDMA
See Section 18.9, ÒIDMA Commands.Ó
STOP IDMA
Set timer. Activates, deactivates, or reconÞgures one of the 16 timers in the RISC timer table.
SET TIMER
Set group address. Sets a bit in the hash table for the Ethernet logical group address recognition
SET GROUP
function.
ADDRESS
GCI abort request. The GCI receiver sends an abort request on the E-bit.
GCI ABORT
REQUEST
GCI time-out. The GCI performs the timeout function.
GCI TIMEOUT
Reset block check sequence. Used in BISYNC mode to reset the block check sequence calculation.
RESET BCS
See Section 27.9, ÒMCC Commands.Ó
MCC STOP
TRANSMIT
See Section 27.9, ÒMCC Commands.Ó
MCC STOP
RECEIVE
See Section 29.14, ÒATM Transmit Command.Ó
ATM TRANSMIT
Generate a random number and put it in dual-port RAM; see RAND in Table 13-10.
RANDOM
NUMBER
13-14
Table 13-8. Command Descriptions
Description
command is issued.
RESTART
MPC8260 PowerQUICC II UserÕs Manual
MOTOROLA
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