PM8621 datasheet(113/184 Pages) PMC

113 / 184 page

NSE-8G™ Standard Product Data Sheet

Preliminary

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

112

Document ID: PMC-2010850, Issue 1

Bit

Type

Function

Default

Bit 31:16

Unused

Bit 15:8

R/W

TX_AUX[7:0]

00000000

Bit 7:6

Reserved

Bit 5:4

R/W

TX_LINK[1:0]

Bit 3:2

Reserved

Bit 1

R/W

TX_CRC_SWIZ_EN

Bit 0

R/W

TX_BYPASS

When this bit is set to ‘1’, the blocks message transmit functions are bypassed. No messages

are inserted into the Transmit Bus data The respective signals are passed through the block’s

pipeline unmodified. Transmit message FIFO RAM is disabled and thus message data writes

are ignored.

TX_CRC_SWIZ_EN

When this bit is set to ‘1’, the calculated CRC-16 is bit reversed before being transmitted.

This facility can be used for diagnostic testing of CRC-16 generation and checking

functionality.

TX_LINK[1:0]

These bits are transmitted in the LINK bits of the message header of the next available

message. On reads these bit return the last written value.

TX_AUX[7:0]

These bits form the input to an Auxiliary channel between CPUs at each end of the link. Their

use is at the Software developers’ discretion. Data written to this register will be transmitted

in the AUX header byte of each subsequent message to the other end of the inband link. A

new value of TX_AUX will be transmitted at the next available message.

Data read from this register will be the data previously written.

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