PM8621 datasheet(123/184 Pages) PMC

123 / 184 page

NSE-8G™ Standard Product Data Sheet

Preliminary

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

122

Document ID: PMC-2010850, Issue 1

RX_TIMEOUTE

Writing a ‘1’ to the RX_TIMEOUTE bit enables the generation of an interrupt when

RX_TIMEOUTI is a ‘1’

RX_THRSHLD_VAL[2:0]

Variable Threshold dictates the minimum number of messages required to be in the RXFIFO

before an interrupt is generated. ‘000’ = 1 message ‘111’ = 8 messages.

Table 9 RXFIFO Threshold Values

RX_THRSHLD_VAL [2:0]

Messages

000

001

010

011

100

101

110

111

If the RXFIFO has not been read for the amount of time indicated by the

RXFIFO_Timeout_delay AND the FIFO is not empty an interrupt will be generated if this bit

is ‘1’. To disable set to ‘0’.

If the RXFIFO overflows an interrupt will be generated if this bit is ‘1’. To disable set to ‘0’.

If the Rx Message fails its CRC check, an interrupt will be generated if this bit is ‘1’. To

disable set to ‘0’.

RX_TIMEOUT_VAL

These bits specify a variable delay, relative to a read from the receive message FIFO, in steps

of 125 us, before an interrupt is generated, if the Receive FIFO level is greater than 0. The

objective is to stop stale messages collecting in the RXFIFO.

PM8621 Datasheet(PDF) 123 Page - PMC-Sierra, Inc