Processor Users Manual

27-4 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA
Part IV. Communications Processor Module
0x0C RINTTMP Word Temporary location for holding the receive interrupt queue entry, used by the CP
(reserved for the user)
0x10 DATA0 Word Temporary location for holding data, used by the CP (reserved for the user)
0x14 DATA1 Word Temporary location for holding data, used by the CP (reserved for the user)
0x18 TINTBASE Word Multi-channel transmitter circular interrupt table base address. The interrupt circular
table is a cyclic table (FIFO-like). Each table entry contains information about an
interrupt request generated by the MCC to the host.
0x1C TINTPTR Word Pointer to the transmitter circular interrupt table. The CP writes the next interrupt
information to this entry when an exception occurs. The user must copy the
TINTBASE value to TINTPTR before enabling interrupts. Further updates of the
TINTPTR are done by the CP.
0x20 TINTTMP Word Temporary location for holding the transmit interrupt queue entry, used by the CP.
The 60x initializes this Þeld before initializing the MCC. The user must clear it before
enabling interrupts.
0x24 SCTPBASE Hword Internal pointer for the super channel transmit table, offset from the DPRAM address
0x26 Ñ Hword
0x28 C_MASK32 Word CRC constant (user initialized to 0xDEBB20E3). Used for 32-bit CRC-CCITT
calculation if HDLC mode is chosen for a selected channel. (This option is
programmable. For each HDLC channel, one of two CRC-CCITT can be selected
through the CHAMR.)
0x2C XTRABASE Hword Pointer the beginning of the extra parameters information, offset from the DPRAM
address
0x2E C_MASK16 Hword CRC constant (user initialized to 0xF0B8). Used for 16-bit CRC-CCITT calculation if
HDLC mode is chosen for a selected channel. This option is programmable. For
each HDLC channel, one of two CRC-CCITT can be selected through the CHAMR.
0x30 RINTTMP0 Word RINTTMPx. Temporary location for holding a receive circular interrupt table entry (for
tables 0Ð4), used by the CP. The user must clear it before enabling interrupts.See
Section 27.10, ÒMCC Exceptions.Ó
0x34 RINTTMP1 Word
0x38 RINTTMP2 Word
0x3C RINTTMP3 Word
0x40 RINTBASE0 Word RINTBASExÑMulti-channel receiver circular interrupt table base address. The
interrupt circular table is a cyclic table (FIFO-like). Each table entry contains
information about an interrupt request generated by the MCC to the host.
RINTPTRxÑPointer to the receiver circular interrupt table. The CP writes the next
interrupt information to this entry when an exception occurs. The user must copy the
RINTBASEx value to RINTPTRx before enabling interrupts. Further updates of the
RINTPTRx are done by the CP.
0x44 RINTPTR0 Word
0x48 RINTBASE1 Word
0x4C RINTPTR1 Word
0x50 RINTBASE2 Word
0x54 RINTPTR2 Word
0x58 RINTBASE3 Word
0x5C RINTPTR3 Word
0x60 TS_TMP Word Temporary place for time stamp
1
Offset to MCC Base
Table 27-1. Global Multiple-Channel Parameters (Continued)
Offset
1
Name Width Description