PM8621 PMC-Sierra, Inc., PM8621 Datasheet - Page 90

• Manufacturer Part Number: PM8621
• Description: NSE-8G Standard Product Data Sheet Preliminary
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
PORTCFG[4:0]
PORTADDR[4:0]
In port transfer mode, one port is updated per word of the offline connection memory page.
PORTCFG: new port mapping to be updated to the connection memory page.
WORDADDR: specifies the address of the offline connection memory page.
PORTADDR: port address of the offline connection memory page.
In word transfer mode, an entire word of the offline connection memory page is updated.
PORTCFG: is ignored.
WORDADDR: specifies the address to the offline connection memory page.
PORTADDR: is ignored.
In either mode, the contents read from the off-line connection memory page can be read by
the microprocessor through the Configuration Output register..
This field contains the input port mapping to a particular output port specified in
PORTADDR. Used only in PORT transfer mode. At all other modes, this field is ignored.
When performing writes to the offline connection memory page, this field indicates the
output port to be updated with new mapping in PORTCFG. A PORTADDR of 0 relates to
output port 0 of the DCB.
This field is valid in PORT transfer mode and during reading from the Configuration Output
register and is ignored in WORD transfer mode. Valid values are 0-31 when performing
writes.
When performing reads through the Configuration Output register, PORTADDR indicates the
ports being read as follows:
000xx : ports 5-0
001xx : ports 11-6
010xx : ports 17-12
011xx : ports 23-18
100xx : ports 29-24
NSE-8G™ Standard Product Data Sheet
Preliminary
89