Motorola MPC8260 - Manual (Page 746)

27-16 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA
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.
Table 27-10. Group Channel Assignments
Group Channels
Group1 in MCCF1 0Ð31
Group2 in MCCF1 32Ð63
Group3 in MCCF1 64Ð95
Group4 in MCCF1 96Ð127
Group1 in MCCF2 128Ð159
Group2 in MCCF2 160Ð191
Group3 in MCCF2 192Ð223
Group4 in MCCF2 224Ð255
Table 27-11. Transmit Commands
Command Description
STOP
TRANSMIT
Disables the transmission on the selected channel and clears CHAMR[POL]. When this command is
issued in the middle of a frame, the CP sends an ABORT indication and then idles/ßags on the
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
STOP
TRANSMIT command was issued.
INIT TX
PARAMETERS
Initializes transmit parameters in this MCC parameter RAM to their reset state. This command should
only be issued when the transmitter is disabled. Note that the MCC initialize commands initialize only
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
INIT
TX AND RX PARAMETERS command can be used to reset both the receive and transmit parameters.