Mcc Commands - Motorola MPC8260 PowerQUICC II User Manual

Part IV. Communications Processor Module
Note that the TDM group channel assignments made in MCCF must be coherent with the
SI register programming and SI RAM programming; see Section 14.5, ÒSerial Interface
Registers,Ó and Section 14.4.3, ÒProgramming SIx RAM Entries.Ó The user must also
program MCCF before enabling the TDM channel in the SIGMR; see Section 14.5.1, ÒSI
Global Mode Registers (SIxGMR).Ó

27.9 MCC Commands

The user starts channels by writing to the TSTATE/RSTATE registers as described in
Section 27.6.4, ÒInternal Receiver State (RSTATE),Ó and Section 27.6.1, ÒInternal
Transmitter State (TSTATE).Ó
The following commands, used to stop and initialize channels, are issued to the MCC by
writing to CPCR as described in Section 13.4.1, ÒCP Command Register (CPCR).Ó
Table 27-11 describes transmit commands.
Command
Disables the transmission on the selected channel and clears CHAMR[POL]. When this command is
STOP
issued in the middle of a frame, the CP sends an ABORT indication and then idles/ßags on the
TRANSMIT
selected channel. If this command is issued between frames, the CP sends only idles or ßags
(depending on CHAMR[IDLM]). TBPTR points for the buffer that the CP was using when the
command was issued.
TRANSMIT
Initializes transmit parameters in this MCC parameter RAM to their reset state. This command should
INIT TX
only be issued when the transmitter is disabled. Note that the MCC initialize commands initialize only
PARAMETERS
the 32 consecutive channels starting with the channel number speciÞed in CPCR[MCN]. To initialize
more than 32 channels, reissue the command with the appropriate channel numbers. Note also the
TX AND RX PARAMETERS
27-16
Table 27-10. Group Channel Assignments
Group
Group1 in MCCF1
Group2 in MCCF1
Group3 in MCCF1
Group4 in MCCF1
Group1 in MCCF2
Group2 in MCCF2
Group3 in MCCF2
Group4 in MCCF2
Table 27-11. Transmit Commands
command can be used to reset both the receive and transmit parameters.
MPC8260 PowerQUICC II UserÕs Manual
Channels
0Ð31
32Ð63
64Ð95
96Ð127
128Ð159
160Ð191
192Ð223
224Ð255
Description
STOP
INIT
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