PM8620 datasheet(97/190 Pages) PMC

97 / 190 page

NSE-20G™ Standard Product Data Sheet

Preliminary

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

Document ID: PMC-2000170, Issue 3

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..

PORTCFG[4:0]

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.

PORTADDR[4:0]

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

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

101xx : ports 31-30 on least significant bits

110xx : ports 5-0

111xx : ports 5-0

WORDADDR[13:0]

This field indicates the address of the update connection memory page to be accessed. This

field relates to the time location within the SBI/TelecomBus frame. I.e. Location 0 would be

the first A1 byte of the frame and location 24 is the C1 character.

This field is ignored in page copy mode. Valid values are 0-9719.

PM8620 Datasheet(PDF) 97 Page - PMC-Sierra, Inc