PI7C9X20404GPBNBE Pericom Semiconductor, PI7C9X20404GPBNBE Datasheet - Page 62

• Manufacturer Part Number: PI7C9X20404GPBNBE
• Description: IC PCIE PACKET SWITCH 148LFBGA
• Manufacturer: Pericom Semiconductor
• Series: GreenPacket™r

Specifications of PI7C9X20404GPBNBE

• Applications: Data Transport
• Interface: Advanced Configuration Power Interface (ACPI)
• Package / Case: 148-LFBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -

7.2.90
7.2.91
7.2.92
June 2009 – Revision 1.6
Pericom Semiconductor
PORT VC STATUS REGISTER – OFFSET 14Ch
VC RESOURCE CAPABILITY REGISTER (0) – OFFSET 150h
VC RESOURCE CONTROL REGISTER (0) – OFFSET 154h
BIT
3:1
15:4
BIT
16
31:17
BIT
7:0
13:8
14
15
22:16
23
31:24
BIT
7:0
FUNCTION
VC Arbitration
Select
Reserved
FUNCTION
VC Arbitration Table
Status
Reserved
FUNCTION
Port Arbitration
Capability
Reserved
Advanced Packet
Switching
Reject Snoop
Transactions
Maximum Time
Slots
Reserved
Port Arbitration
Table Offset
FUNCTION
TC/VC Map
TYPE
TYPE
TYPE
TYPE
RW
RW
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Page 62 of 79
DESCRIPTION
This field is used to configure the VC Arbitration by selecting one of the
supported VC Arbitration schemes. The valid values for the schemes
supported by Switch are 0b and 1b. Other value than these written into this
register will be treated as default.
Reset to 0b.
Reset to 0.
DESCRIPTION
When set, it indicates that any entry of the VC Arbitration Table is written by
software. This bit is cleared when hardware finishes loading values stored in
the VC Arbitration Table after the bit of “Load VC Arbitration Table” is set.
Reset to 0b.
Reset to 0.
DESCRIPTION
It indicates the types of Port Arbitration supported by the VC resource. The
Switch supports Hardware fixed arbitration scheme, e.g., Round Robin,
Weight Round Robin (WRR) arbitration with 128 phases (3~4 enabled ports)
and Time-based WRR with 128 phases (3~4 enabled ports). Note that the
Time-based WRR is only valid in VC1.
Reset to 00001001b.
Reset to 000000b.
When set, it indicates the VC resource only supports transaction optimized
for Advanced Packet Switching (AS).
Reset to 0b.
This bit is not applied to PCIe Switch.
Reset to 0b.
It indicates the maximum numbers of time slots (minus one) are allocated for
Isochronous traffic. The default value may be changed by SMBus or auto-
loading from EEPROM.
Reset to 7Fh.
Reset to 0b.
It indicates the location of the Port Arbitration Table (n) as an offset from the
base address of the Virtual Channel Capability register in the unit of DQWD
(16 bytes).
Reset to 04h for Port Arbitration Table (0).
DESCRIPTION
This field indicates the TCs that are mapped to the VC resource. Bit locations
within this field correspond to TC values. When the bits in this field are set, it
means that the corresponding TCs are mapped to the VC resource. The
default value may be changed by SMBus or auto-loading from EEPROM.
Reset to FFh.
4Port-4Lane PCI Express Switch
GreenPacket
PI7C9X20404GP
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