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Ethernet Subsystem Registers
14.5.8.5 PTYPE Register (offset = 10h) [reset = 0h]
PTYPE is shown in Figure 14-188 and described in Table 14-205.
TRANSMIT PRIORITY TYPE REGISTER
Figure 14-188. PTYPE Register
31 30 29 28 27 26 25 24
Reserved
23 22 21 20 19 18 17 16
Reserved P2_PRI3_SHAPE_EN P2_PRI2_SHAPE_EN P2_PRI1_SHAPE_EN P1_PRI3_SHAPE_EN P1_PRI2_SHAPE_EN P1_PRI1_SHAPE_EN
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
15 14 13 12 11 10 9 8
Reserved P2_PTYPE_ESC P1_PTYPE_ESC P0_PTYPE_ESC
R/W-0 R/W-0 R/W-0
7 6 5 4 3 2 1 0
Reserved ESC_PRI_LD_VAL
R/W-0
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 14-205. PTYPE Register Field Descriptions
Bit Field Type Reset Description
21 P2_PRI3_SHAPE_EN R/W-0 0 Port 2 Queue Priority 3 Transmit Shape Enable - If there is only one
shaping queue then it must be priority 3.
20 P2_PRI2_SHAPE_EN R/W-0 0 Port 2 Queue Priority 2 Transmit Shape Enable - If there are two
shaping queues then they must be priorities 3 and 2.
19 P2_PRI1_SHAPE_EN R/W-0 0 Port 2 Queue Priority 1 Transmit Shape Enable - If there are three
shaping queues all three bits should be set.
18 P1_PRI3_SHAPE_EN R/W-0 0 Port 1 Queue Priority 3 Transmit Shape Enable - If there is only one
shaping queue then it must be priority 3.
17 P1_PRI2_SHAPE_EN R/W-0 0 Port 1 Queue Priority 2 Transmit Shape Enable- If there are two
shaping queues then they must be priorities 3 and 2.
16 P1_PRI1_SHAPE_EN R/W-0 0 Port 1 Queue Priority 1 Transmit Shape Enable- If there are three
shaping queues all three bits should be set.
10 P2_PTYPE_ESC R/W-0 0 Port 2 Priority Type Escalate -
0 - Port 2 priority type fixed
1 - Port 2 priority type escalate Escalate should not be used with
queue shaping.
9 P1_PTYPE_ESC R/W-0 0 Port 1 Priority Type Escalate -
0 - Port 1 priority type fixed
1 - Port 1 priority type escalate Escalate should not be used with
queue shaping.
8 P0_PTYPE_ESC R/W-0 0 Port 0 Priority Type Escalate -
0 - Port 0 priority type fixed
1 - Port 0 priority type escalate Escalate should not be used with
queue shaping.
4-0 ESC_PRI_LD_VAL R/W-0 0 Escalate Priority Load Value When a port is in escalate priority, this
is the number of higher priority packets sent before the next lower
priority is allowed to send a packet.
Escalate priority allows lower priority packets to be sent at a fixed
rate relative to the next higher priority.
1429
SPRUH73H–October 2011–Revised April 2013 Ethernet Subsystem
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