PM8621 datasheet(94/184 Pages) PMC

94 / 184 page

NSE-8G™ Standard Product Data Sheet

Preliminary

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

Document ID: PMC-2010850, Issue 1

Bit

Type

Function

Default

Bit 31- 8

Unused

Bit 7-6

R/W

MF_SWAP[1:0]

Bit 5

R/W

AUTO

Bit 4

R/W

SWAP_PE

Bit 3

R/W

UPDATEE

Bit 2

R/W

FRAMEE

Bit 1

SWAPPV

Bit 0

UPDATEV

MF_SWAP [1:0]

This bit selects when RC1FP is expected and synchronizes when page swaps can occur. Table

below relates MFSWAP to all vital variables from the DCB:

MFSWAP

Configuration

Page Size

Frame

Switching @

(9720 byte

frame)

Frame

Interrupt

RC1FP

expected

every

Switching Mode

1080

1 frame

4 frame

TelecomBus

1080

4 frame

SBI column mode

9720

4 frame

SBI DS0 mode

9720

48 frame

SBI DS0 with CAS

AUTO

This bit enables an automatic copy of the online connection memory page to the offline

connection memory page after the connection memory page is switched. Toggling the AUTO

bit to ‘0’ while a page copy is in progress will terminate the page copy process.

0: automatic update disabled.

1: automatic update enabled.

If automatic page copying is used, the page copy will take place automatically whenever the

connection memory page swaps. This means that the UPDATEV register bit will be asserted

immediately following a change from 1 to 0 in the SWAPV register bit. When the AUTO bit

is set, access to the offline connection memory page is restricted from when a page swap is

pending until when the page copy is complete

SWAP_PE

This bit enables the propagation of interrupt to the INT output due to a change in state of

SWAPV. This bit does not have an impact on SWAPI bit.

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