Motorola PowerQUICC II MPC8280 Series Reference Manual page 944

Channel-Specific Parameters
Table 29-1. Global MCC Parameters (continued)
1
Offset Name Width
0x40 RINTBASE0 Word
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
1
Offset to MCC Base
29.3 Channel-Specific Parameters
Each FIFO in the MCC is managed by a set of channel-specific parameters. These
parameters can change based upon what protocol is being used on that channel. The
following sections describe the various programming models used for an MCC channel.
29.3.1 Channel-Specific HDLC Parameters
Table 29-2 describes channel-specific parameters for HDLC.
Table 29-2. Channel-Specific Parameters for HDLC
1
Offset Name Width
0x00 TSTATE Word Tx internal state. To start a transmitter channel the user must write to TSTATE
0x04 ZISTATE Word Zero-insertion machine state. User-initialized to one of the following values:
0x08 ZIDATA0 Word Zero-insertion high word data buffer. User-initialized to one of the following values:
0x0C ZIDATA1 Word Zero-insertion low word data buffer. User-initialized to one of the following values:
29-6
Freescale Semiconductor, Inc.
RINTBASEx—Multi-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.
RINTPTRx—Pointer 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.
Temporary place for time stamp
0xHH80_0000. HH is the TSTATE high byte described in Section 29.3.1.1, "Internal
Transmitter State (TSTATE)—HDLC Mode."
0x10000207 for regular channel transmitting all 1s before first frame of data
0x00000207 for regular channel transmitting flags before first frame of data
0x30000207 for inverted channel transmitting all 1s before first frame of data
0x20000207 for inverted channel transmitting flags before first frame of data
Note: Used in conjunction with ZIDATA0 and ZIDATA1.
0xFFFFFFFF allows transmission of all 1s before first frame of data
0x7E7E7E7E allows transmission of flags before first frame of data
Note: Used in conjunction with ZISTATE and ZIDATA1.
0xFFFFFFFF allows transmission of all 1s before first frame of data
0x7E7E7E7E allows transmission of flags before first frame of data
Note: Used in conjunction with ZISTATE and ZIDATA0.
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