IDT 89HPES34H16, User Manual, Page: 141 / 182

IDT Configuration Registers
PES34H16 User Manual 9 - 49 October 30, 2008
Notes
VCR0CAP- VC Resource 0 Capability (0x210)
VCR0CTL- VC Resource 0 Control (0x214)
Bit
Field
Field
Name
Type
Default
Value
Description
7:0 PARBC RWL 0x1 Port Arbitration Capability. This field indicates the type of
port arbitration supported by the VC. Each bit corresponds to
a Port Arbitration capability. When more than one arbitration
scheme is supported, multiple bits may be set.
All ports support hardware fixed round robin.
bit 0 - hardware fixed round robin
bits 1 through 5 - reserved
13:8 Reserved RO 0x0 Reserved field.
14 APS RO 0x0 Advanced Packet Switching. Not supported.
15 RJST RO 0x0 Reject Snoop Transactions. No supported for switch ports.
22:16 MAXTS RO 0x0 Maximum Time Slots. Since this VC does not support time-
based WRR, this field is not valid.
23 Reserved RO 0x0 Reserved field.
31:24 PATBLOFF RWL 0x0 Port Arbitration Table Offset. This field contains the offset
of the port arbitration table from the base address of the Vir-
tual Channel Capability structure in double quad words (16
bytes).
Bit
Field
Field
Name
Type
Default
Value
Description
7:0 TCVCMAP bit 0
RO
bits 1
through
7
RW
0xFF TC/VC Map. This field indicates the TCs that are mapped to
the VC resource. Each bit corresponds to a TC. When a bit is
set, the corresponding TC is mapped to the VC.
15:8 Reserved RO 0x0 Reserved field.
16 LPAT RW 0x0 Load Port Arbitration Table. This bit, when set, updates the
Port Arbitration logic from the Port Arbitration Table for the VC
resource. In addition, this field is only valid when the Port
Arbitration Table is used by the selected Port Arbitration
scheme (that is indicated by a set bit in the Port Arbitration
Capability field selected by Port Arbitration Select).
Software sets this bit to signal hardware to update Port Arbi-
tration logic with new values stored in Port Arbitration Table;
clearing this bit has no effect. Software uses the Port Arbitra-
tion Table Status bit to confirm whether the new values of Port
Arbitration Table are completely latched by the arbitration
logic.
This bit always returns 0 when read.