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
Содержание MPC8260 PowerQUICC II
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