<> <> <> <> <<>> <> <none, 1->WRAck, 2->WRMask, 3->WRReason), INT (0), IntIntr (2), ITSrvDone (0)>> <<>> <> <> <<>> <<
Reset
DIn
WRSelect
INT
IntIntr
ITSrvDone |
StatusOut
MaskOut
ReasonOut
ITSrvRqrd --
Comment>> <<>> <> <> 1 00000000 0 0 0 0 | XXXXXXXX XXXXXXXX XXXXXXXX X -- Unknown state 1 00000000 0 0 0 0 | XXXXXXXX 00000000 XXXXXXXX 0 -- Unknown state 1 00000000 0 0 0 0 | 00000000 00000000 XXXXXXXX 0 -- Reason is not reset 0 00000000 0 0 0 0 | 00000000 00000000 XXXXXXXX 0 -- Rescind Reset and check <> 0 12345678 3 0 0 0 | 00000000 00000000 XXXXXXXX 0 -- Write Reason 0 00000000 0 0 0 0 | XXXXXXXX 00000000 12340000 0 -- results in partial write only <> 0 00000000 0 1 0 0 | 00000000 00000000 12340000 0 -- Setup INT 0 00000000 0 0 0 0 | 00000000 00000000 12340000 0 0 00000000 0 1 0 0 | 80000000 00000000 12340000 0 0 00000000 0 1 0 0 | 00000000 00000000 12340000 0 -- Check 2 cycles delay <> 0 00000000 0 1 2 0 | 80000000 00000000 12340000 0 -- Setup Int interrupt 0 00000000 0 1 0 0 | C0000000 00000000 12340000 0 -- Check went through 0 00000000 0 1 0 0 | C0000000 00000000 12340000 0 -- And stays 0 60000000 1 1 0 0 | C0000000 00000000 12340000 0 -- Acknowledge all ITs 0 00000000 0 1 0 0 | 80000000 00000000 12340000 0 -- Check cleared exactly one 0 60000000 1 1 2 0 | 80000000 00000000 12340000 0 -- Check that Int overrides Ack 0 00000000 0 1 0 0 | C0000000 00000000 12340000 0 -- Must have interrupt 0 60000000 1 1 0 0 | C0000000 00000000 12340000 0 -- Remove it 0 00000000 0 1 0 0 | 80000000 00000000 12340000 0 -- Done <> 0 00000000 0 0 0 0 | 80000000 00000000 12340000 0 -- Remove all interrupts 0 00000000 0 0 0 0 | 80000000 00000000 12340000 0 -- (takes 2 cycles) 0 00000000 0 0 0 0 | 00000000 00000000 12340000 0 0 DFABCDEF 2 0 0 0 | 00000000 00000000 12340000 0 -- Setup mask 0 00000000 0 0 0 0 | 00000000 C0000000 12340000 0 -- Check only 3 MSB stored 0 00000000 0 1 0 0 | 00000000 C0000000 12340000 0 -- Raise an INT that's masked 0 00000000 0 1 1 0 | 00000000 C0000000 12340000 0 -- Add a visible IntIntr 0 00000000 0 1 0 0 | A0000000 C0000000 12340000 0 -- both visible simultaneously! 0 00000000 0 1 0 0 | A0000000 C0000000 12340000 1 -- 2nd IT rqrs service 0 00000000 0 1 0 0 | A0000000 C0000000 12340000 1 -- Nothing changed 0 00000000 0 1 0 1 | A0000000 C0000000 12340000 1 -- Service it 0 00000000 0 1 0 0 | A0000000 C0000000 12340000 0 -- No more srvc rqrd 0 00000000 0 1 0 0 | A0000000 C0000000 12340000 0 -- Should not reappear 0 20000000 2 1 0 0 | A0000000 C0000000 12340000 0 -- Unmask pending IT 0 00000000 0 1 0 0 | A0000000 20000000 12340000 0 -- Mask updated 0 00000000 0 1 0 0 | A0000000 20000000 12340000 1 -- Pending interrupt rqrs srvc 0 00000000 0 1 0 0 | A0000000 20000000 12340000 1 -- Pending interrupt rqrs srvc 0 00000000 0 1 0 1 | A0000000 20000000 12340000 1 -- Service it 0 00000000 0 1 0 0 | A0000000 20000000 12340000 0 -- No more service pending .