IDT88K8483 Integrated Device Technology, IDT88K8483 Datasheet - Page 36

• Manufacturer Part Number: IDT88K8483
• Description: Spi-4 Exchange Document Issue 1.0
• Manufacturer: Integrated Device Technology

Data Path Detailed Description
utary to Main (PFP-B-MT) and PFP module B Main to Tributary PFP-B-MT.
to SPI-4 Main Data Path
SPI-4 Tributary Data Path
Tributary
SPI-4s
IDT IDT88K8483
There are several data paths in the device as shown in the figures below.
There are four PFPs in the device: PFP module A Tributary to Main (PFP-A-MT), PFP module A Main to Tributary (PFP-A-MT), PFP module B Trib-
SPI-4 tributary to SPI-4 main data path conveys data from SPI-4 tributary ingress to SPI-4 main egress as shown in
SPI-4 main to SPI-4 tributary data path conveys data from SPI-4 main ingress to SPI-4 tributary egress as shown in
Interface
Interface
SPI-4A
SPI-4B
SPI-4 Egress
SPI-4 Egress
SPI-4 Ingress
Port Buffers
SPI-4 Egress
SPI-4 Egress
Port Buffers
SPI-4 Egress
SPI-4 Ingress
Port Buffers
Port Buffers
SPI-4 Egress
p.36.
p.37.
Microprocessor
Microprocessor
SPI-4 Egress
SPI-4 Egress
SPI-4 Egress
SPI-4 Egress
Auxiliary
Auxiliary
Interface
Interface
Figure 9 SPI-4 Tributary to SPI-4 Main Data Path
Entry 255
Entry 0
Entry 1
Entry 2
Entry 3
Figure 8 SPI-4 Egress Calendar Example
Processor A-TM (PFP)
Processor B-TM (PFP)
Processor B-MT (PFP)
Calendar (256 entries)
Processor A-MT (PFP)
Packet Fragment
Packet Fragment
Packet Fragment
Packet Fragment
LID 6 (Starving)
LID 5 (Hungry)
LID 1 (Starving)
LID 0 (Starving)
LID 4 (Hungry)
36 of 162
.
.
.
Microprocessor
SPI-4 Egress
Microprocessor
SPI-4 Egress
Internal Traffic
Internal Traffic
Generator
Detector
SPI-4 Egress
SPI-4 Egress
SPI-4 Egress
SPI-4 Ingress
Port Buffers
SPI-4 Egress
Port Buffers
Port Buffers
SPI-4 Egress
SPI-4 Egress
SPI-4 Ingress
Port Buffers
Figure 9 SPI-4 Tributary
Figure 10 SPI-4 main to
October 20, 2006
SPI-4M
Interface
Main
SPI-4s