IDT 89HPES24N3A, User Manual

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IDT Configuration Registers
PES24N3A User Manual 9 - 47 April 10, 2008
Notes
VCR0TBL0 - VC Resource 0 Arbitration Table Entry 0 (0x220)
VCR0TBL1 - VC Resource 0 Arbitration Table Entry 1 (0x224)
16 PATS RO 0x0 Port Arbitration Table Status. This bit indicates the coher-
ency status of the port arbitration table associated with the
VC resource and is valid only when the port arbitration table
is used by the selected arbitration algorithm.
This bit is set when any entry of the port arbitration table is
written by software and remains set until hardware finishes
loading the value after software sets the LPAT field in the
VCR0CTL register.
This field is always zero for downstream ports.
17 VCNEG RO 0x0 VC Negotiation Pending. Since the PES24N3A imple-
ments only a single VC (i.e., the default VC) this field indi-
cates the status of the process of flow control initialization.
31:18 Reserved RO 0x0 Reserved field.
Bit
Field
Field
Name
Type
Default
Value
Description
3:0 PHASE0 RW 0x0 Phase 0. This field contains the port ID for the correspond-
ing port arbitration period. Selecting an invalid port ID
results in the entry being skipped without delay.
The port arbitration behavior when this field contains an ille-
gal value (i.e., reserved or the egress port ID) is undefined.
0x0 -(port_0) Port 0 (upstream port)
0x1 - reserved
0x2 -(port_2) Port 2
0x3 - reserved
0x4 -(port_4) Port 4
0x5 - through 0xF - reserved
7:4 PHASE1 RW 0x0 Phase 1. This field contains the port ID for the correspond-
ing port arbitration period.
11:8 PHASE2 RW 0x0 Phase 2. This field contains the port ID for the correspond-
ing port arbitration period.
15:12 PHASE3 RW 0x0 Phase 3. This field contains the port ID for the correspond-
ing port arbitration period.
19:16 PHASE4 RW 0x0 Phase 4. This field contains the port ID for the correspond-
ing port arbitration period.
23:20 PHASE5 RW 0x0 Phase 5. This field contains the port ID for the correspond-
ing port arbitration period.
27:24 PHASE6 RW 0x0 Phase 6. This field contains the port ID for the correspond-
ing port arbitration period.
31:28 PHASE7 RW 0x0 Phase 7. This field contains the port ID for the correspond-
ing port arbitration period.
Bit
Field
Field
Name
Type
Default
Value
Description
3:0 PHASE8 RW 0x0 Phase 8. This field contains the port ID for the correspond-
ing port arbitration period.
Bit
Field
Field
Name
Type
Default
Value
Description