Information

Enhanced Three-Speed Ethernet Controllers
MPC8308 PowerQUICC II Pro Processor Reference Manual, Rev. 1
16-42 Freescale Semiconductor
16.5.3.2.5 Transmit Queue Control Register (TQUEUE)
The TQUEUE register, shown in Figure 16-15, selectively enables each of the TxBD rings 0–7. By default,
TxBD ring 0 is enabled.
Table 16-20 describes the TQUEUE register.
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16.5.3.2.6 TxBD Ring 0–3 Weighting Register (TR03WT)
When modified weighted round-robin Tx scheduling is enabled (TCTRL[TXSCHED] = 10), this register
determines the weighting applied to each transmit queue for queues 0 to 3. For priority-based scheduling,
Offset eTSEC1:0x2_4114; eTSEC2:0x2_5114 Access: Read/Write
0 15161718192021222324 31
R
— EN0 EN1 EN2 EN3 EN4 EN5 EN6 EN7 —
W
Reset0000000000000000 1 0 0 0 0 0 0 0 00000000
Figure 16-15. TQUEUE Register Definition
Table 16-20. TQUEUE Field Descriptions
Bits Name Description
0–15 — Reserved
16 EN0 Transmit queue 0 enable.
0 TxBD ring is not queried for transmission. In effect the transmit queue is disabled.
1 TxBD ring is queried for transmission.
17 EN1 Transmit queue 1 enable.
0 TxBD ring is not queried for transmission. In effect the transmit queue is disabled.
1 TxBD ring is queried for transmission.
18 EN2 Transmit queue 2 enable.
0 TxBD ring is not queried for transmission. In effect the transmit queue is disabled.
1 TxBD ring is queried for transmission.
19 EN3 Transmit queue 3 enable.
0 TxBD ring is not queried for transmission. In effect the transmit queue is disabled.
1 TxBD ring is queried for transmission.
20 EN4 Transmit queue 4 enable.
0 TxBD ring is not queried for transmission. In effect the transmit queue is disabled.
1 TxBD ring is queried for transmission.
21 EN5 Transmit queue 5 enable.
0 TxBD ring is not queried for transmission. In effect the transmit queue is disabled.
1 TxBD ring is queried for transmission.
22 EN6 Transmit queue 6 enable.
0 TxBD ring is not queried for transmission. In effect the transmit queue is disabled.
1 TxBD ring is queried for transmission.
23 EN7 Transmit queue 7 enable.
0 TxBD ring is not queried for transmission. In effect the transmit queue is disabled.
1 TxBD ring is queried for transmission.
24–31 — Reserved