PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 384

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
GFC[3:0]
The GFC[3:0] (Generic Flow Control) bits contain the first, second, third, and fourth bit
positions of the first octet of the idle/unassigned cell pattern. Idle/unassigned cells are
transmitted when the TCFP detects that no outstanding cells are available from the FIFO and
data is requested on the TCFP egress interface. Additionally, XOFF can be used to force the
transmission of Idle/Unassigned cells in ATM mode. The all zeros pattern is transmitted in
the VCI and VPI fields of the idle/unassigned cell.
S/UNI-2488 Telecom Standard Product Datasheet
Released
384