IDT CPS-1848, User Manual

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6. Event Management > Event Notification
CPS-1848 User Manual 153 June 2, 2014
Formal Status This document is confidential and is subject to an NDA.
Integrated Device Technology
6.3.11.1 Error Flags
If any bit is set in the
Error Log Match Status Register , the interrupt signal is asserted. If the Error Log
Register .ALL_FLAG_STOP bit is set, then when all flags are asserted, the following actions occur:
• The Error Log stops accepting more event reports
• The
Error Log Control 2 Register .STOP_EM bit is set
• An IDT port-write is transmitted
6.3.11.2 Error Counter
Using the
Error Log Match Register {0..7} , the user can define which errors when detected, increment the Error Log Events
Register . If the counter reaches its maximum value of 0xFFFF it will stop incrementing, and remain at its maximum value until
it is reset. If the Error Log Register .CNTR_MAX_STOP bit is set, and the counter reaches its maximum value, then the Error
Log stops accepting more event reports and generates a port-write based on the register description.
The Counter is reset when the Error Manager is reset, or the CNT_RESET bit is set in the Error Log Control 2 Register .
6.3.11.3 Error Management Stop
The Error Manager will stop if a specific error is detected and the
Error Log Match Register {0..7} .STOP_EN. bit is set. The
user can stop the Error Manager by setting Error Log Control 2 Register .STOP_EM to 1. The user must set the same bit to 0 to
enable the Error Manager function.
The Event Log stops accepting further events when the Error Manager is stopped.
6.3.11.4 Error Log Notification Examples
The examples in
Table 57 demonstrate how to trigger IDT port-writes and interrupts under various scenarios. This assumes
that the events have been configured to be reported to the Error Log as described in Event Notification .
All 8 flag bits must be asserted, which requires that all Error Log Match Register {0..7} settings must
have detected an event.
Table 57: Error Log Event Notification Examples
Scenario Step
Register
Address
Register Value
Send an IDT port-write when lane 2 loses
lane-sync Configure Error Log Error Log Match
Register {0..7} (n=3) for Notification
0xFD0014 0x00024260
Send an Interrupt when any lane loses
lane-sync Configure Error Log Error Log Match
Register {0..7} (n=0) for Notification
0xFD0008 0x00440060
Count all lane events detected by the
CPS-1848 Configure Error Log Error Log Match
Register {0..7} (n=7) to count all lane
events
0xFD0024 0x00580060