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5.79PortResponseTime-OutControlCSR(SP_RT_CTL)
SRIORegisters
Figure135.PortResponseTime-OutControlCSR(SP_RT_CTL)
31-16
TIMEOUT_VALUE
RW-0xFFFFFF
LEGEND:R=Readonly;-n=valueafterreset
15-87-0
TIMEOUT_VALUEReserved
RW-0xFFFFFFR-0x00
LEGEND:R=Readonly;-n=valueafterreset
Table109.PortResponseTime-OutControlCSR(SP_RT_CTL)FieldDescriptions
BitFieldValueDescription
31-8TIMEOUT_VALUTimeoutvalueforallportsonthedevice.Thistimeoutisforsendingapackettoreceivingthe
Ecorrespondingresponsepacket.Maxvaluerepresents3-6seconds.Thetimeoutdurationcanbe
expressedas:Timeout=15*((Prescalevalue+1)*DMAclockperiod*TimeoutValue);where
Prescalevalueissetin0x0020PSCRandtheTimeoutvalueisthedecimalrepresentationofthis
registervalue.Example:400MhzDMA,Prescalar0100b,TimeoutValueFFFFFFh;Timeout
duration=15*(4+1)*2.5nS*16777216=3.15s.
7-0ReservedReserved
SPRU976–March2006SerialRapidIO(SRIO)181
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