cn8236 Mindspeed Technologies, cn8236 Datasheet - Page 211

• Manufacturer Part Number: cn8236
• Description: Atm Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

CN8236
ATM ServiceSAR Plus with xBR Traffic Management
28236-DSH-001-B
6.4.2.1 Configuring the
Link for GFC Operation
The following example describes a sequence of how to auto-configure a link for
GFC operation after the link has been initialized:
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Host sets a software GFC initialization timer = 0.
Disable reassembly coprocessor by setting RSM_CTRL0(RSM_EN) = 0.
Set the framer chip to pass unassigned cells.
Enable the GFC link interrupt (GFC_LINK) by setting HOST_IMASK0
(EN_GFC_LINK) = 1.
Read HOST_ISTAT0 register twice to clear it.
Enable the reassembly coprocessor and set the GFC initialization timer to
some user-assigned value.
Upon occurrence of an interrupt and before the GFC initialization timer
expires, read HOST_ISTAT0. If GFC_LINK is a logic high, continue. If
the timer expires before GFC_LINK is detected, do not enable the link for
GFC processing.
Set SEG_CTRL(SEG_GFC) to a logic high.
Set the GFCn bit(s) in the SCH_PRI register to enable the appropriate
priority queue(s) for GFC-controlled operation.
Set the framer chip to generate unassigned cells with GFC field in cell
headers set to the value of 0001.
Mindspeed Technologies
™
6.4 GFC Flow Control Manager
6.0 Traffic Management
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