PI7C9X20505GPBNDE Pericom Semiconductor, PI7C9X20505GPBNDE Datasheet - Page 47

• Manufacturer Part Number: PI7C9X20505GPBNDE
• Description: IC PCIE PACKET SWITCH 256BGA
• Manufacturer: Pericom Semiconductor
• Series: GreenPacket™r

Specifications of PI7C9X20505GPBNDE

• Applications: Data Transport
• Interface: Advanced Configuration Power Interface (ACPI)
• Package / Case: 256-PBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -

June 2009 – Revision 1.5
Pericom Semiconductor
BIT
2:1
3
4
5
6
7
13:8
14
15
16
17
21:18
25:22
27:26
29:28
FUNCTION
Cut-through
Threshold
Port Arbitration
Mode
Credit Update Mode
Ordering on
Different Egress Port
Mode
Ordering on
Different Tag of
Completion Mode
Reserved
Power management
Control parameter
RX Polarity
Inversion Disable
Compliance pattern
Parity Control
Disable
Low Driver Current
High Driver Current
Driver Transmit
Current
De-emphasis
Transmit
Equalization
Receive Termination
Adjustment
Transmit
Termination
Adjustment
TYPE
HwInt
HwInt
HwInt
HwInt
HwInt
HwInt
RW
RW
RW
RW
RW
RW
RO
RO
RO
Page 47 of 81
DESCRIPTION
Cut-through Threshold. When forwarding a packet from low-speed port to
high-speed mode, the chip provides the capability to adjust the forwarding
threshold. The default value may be changed by SMBus or auto-loading from
EEPROM.
00b: the threshold is set at the middle of forwarding packet
01b: the threshold is set ahead 1-cycle of middle point
10b: the threshold is set ahead 2-cycle of middle point.
11b: the threshold is set ahead 3-cycle of middle point.
Reset to 01b.
When set, the round-robin arbitration will stay in the arbitrated port even if
the credit is not enough but request is pending.
When clear, the round-robin arbitration will always go to the requesting port,
which the outgoing credit is enough for the packet queued in the port.
The default value may be changed by SMBus or auto-loading from
EEPROM.
Reset to 0b.
When set, the frequency of releasing new credit to the link partner will be one
credit per update.
When clear, the frequency of releasing new credit to the link partner will be
two credits per update.
The default value may be changed by SMBus or auto-loading from
EEPROM.
Reset to 0b.
When set, there has ordering rule on packets for different egress port. The
default value may be changed by SMBus or auto-loading from EEPROM.
Reset to 0b.
When set, there has ordering rule between completion packet with different
tag. The default value may be changed by SMBus or auto-loading from
EEPROM.
Reset to 0b.
Reset to 0.
The default value may be changed by SMBus or auto-loading from
EEPROM.
Reset to 000001b.
The default value may be changed by SMBus or auto-loading from
EEPROM.
Reset to 0b.
The default value may be changed by SMBus or auto-loading from
EEPROM.
Reset to 0b.
It indicates the status of the strapping pin LODRV. The default value may be
changed by SMBus or auto-loading from EEPROM.
It indicates the status of the strapping pin HIDRV. The default value may be
changed by SMBus or auto-loading from EEPROM.
It indicates the status of the strapping pins DTX[3:0]. The default value may
be changed by SMBus or auto-loading from EEPROM.
It indicates the status of the strapping pins DEQ[3:0]. The default value may
be changed by SMBus or auto-loading from EEPROM.
It indicates the status of the strapping pins RXTRMADJ[1:0]. The default
value may be changed by SMBus or auto-loading from EEPROM.
It indicates the status of the strapping pins TXTRMADJ[1:0]. The default
value may be changed by SMBus or auto-loading from EEPROM.
5Port-5Lane PCI Express Switch
GreenPacket
PI7C9X20505GP
Datasheet
TM
Family