PM8621 datasheet(115/184 Pages) PMC

115 / 184 page

NSE-8G™ Standard Product Data Sheet

Preliminary

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

114

Document ID: PMC-2010850, Issue 1

TX_MSG_LVL[3:0]

This indicates the current number of messages in the TXFIFO.

Table 7 TX FIFO Message Level

TX_MSG_LVL[3:0]

Number of messages

0000

1000

Values greater than 1000 will not occur. The number of free messages available in the FIFO is

given by (8 – TX_MSG_LVL).

IUSER

This bits are a reflection of the IUSER[2:0]. These reflect the USER bits that will be

transmitted in subsequent message headers. There is no default value for these bits as they are

device dependant.

IPAGE

This bits are a reflection of the IPAGE[1:0. These reflect the PAGE bits that will be

transmitted in subsequent message headers. There is no default value for these bits as they are

device dependant.

TX_LINK[1:0]

These bits reflect the last written value of the TX_LINK field of the TX Control register. The

upper byte of this register therefore reflects all of the configurable bits of the message

Header1 byte.

TX_MSG_LVL_VALID

This bit indicates that the value of TX_MSG_LVL is valid. When read with a ‘0’ this register

should be re-read until TX_MSG_LVL_VALID is a ‘1’. This bit will be clear for only

approximately 0.3% of time.

PM8621 Datasheet(PDF) 115 Page - PMC-Sierra, Inc