Motorola PowerQUICC II MPC8280 Series Reference Manual page 1109

Table 31-48 describes FCCE fields.
Table 31-48. FCCE/FCCM Field Descriptions
Bits Name
0–4 — Reserved, should be cleared.
5 TIRU Transmit internal rate underrun. A cumulative lag of seven cells has formed between the
programmable rate and the actual rate for a specific Phy. A transmit internal rate counter expired and
a cell was not sent, either because of slow CPM performance or slow PHY performance. TIRU may
be set only when using transmit internal rate mode; see Section 31.15.1.1, "FCC Transmit Internal
Rate Register (FTIRRx)."
6 GRLI Global red-line interrupt. GRLI is set when a free buffer pool's RLI flag is set. The RLI flag is also set
in the free buffer pool's parameter table.
7 GBPB Global buffer pool busy interrupt. GBPB is set when a free buffer pool's BUSY flag is set. The BUSY
flag is also set in the free buffer pool's parameter table.
8–11 GINTx Global interrupt. Set when the number of events sent to the corresponding interrupt queue reaches
the corresponding event threshold. See Section 31.11, "ATM Exceptions."
12–15 INTOx Interrupt queue overflow. Set when an overflow condition occurs in the corresponding interrupt
queue. This occurs when the CP attempts to overwrite a valid interrupt entry. See Section 31.11.1,
"Interrupt Queues."
16–31 — Reserved, should be cleared.
31.14 ATM Transmit Command
The CPM command set includes an
register (CPCR), described in Section 14.4.1.
The command (CPCR[opcode] = 0b1010, CPCR[SBC[code]] = 0b01110,
ATM TRANSMIT
CPCR[SBC[page]] = 0b00100 or 0b00101 (FCC1 or FCC2), CPCR[MCN] =
0b0000_1010) turns a passive channel into an active channel by inserting it into the APC
scheduling table. Note that an
channel's TCT is completely initialized and the channel has BDs ready to transmit. Note
also that CPCR[SBC[code]] = 0b01110 and not FCC1 or FCC2 code.
Before issuing the command, the user should initialize COMM_INFO fields in the
parameter RAM as described in Figure 31-61.
Offset
0 1 2
0x86 —
0x88
0x8A
MOTOROLA Chapter 31. ATM Controller and AAL0, AAL1, and AAL5
Freescale Semiconductor, Inc.
ATM TRANSMIT
ATM TRANSMIT
3 4 5 6
CTB
Channel Code (CC)
Figure 31-61. COMM_INFO Field
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Description
that can be sent to the CP command
command should be issued only after the
7 8 9 10 11
PHY#
BT
ATM Transmit Command
12 13 14 15
ACT PRI
31-95