Analog Devices ADSP-BF53x Blackfin, Reference

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ADSP-BF53x/BF56x Blackfin Processor Programming Reference 4-59
Program Sequencer
SEQSTAT Register
The Sequencer Status register (
SEQSTAT
) contains information about the
current state of the sequencer as well as diagnostic information from the
last event.
SEQSTAT
is a read-only register and is accessible only in Supervi-
sor mode.
Hardware Error Interrupt
The Hardware Error Interrupt indicates a hardware error or system mal-
function. Hardware errors occur when logic external to the core, such as a
memory bus controller, is unable to complete a data transfer (read or
write) and asserts the core’s error input signal. Such hardware errors
invoke the Hardware Error Interrupt (interrupt
IVHW
in the Event Vector
Table (EVT) and
ILAT
,
IMASK
, and
IPEND
registers). The Hardware Error
Figure 4-11. Sequencer Status Register
Sequencer Status Register (SEQSTAT)
EXCAUSE[5:0]
Holds information about
the last executed excep-
tion. See
Table 4-11 .
Reset = 0x0000 0000
HWERRCAUSE[1:0]
Holds cause of last hard-
ware error generated by
the core. Hardware errors
trigger interrupt number 5
(IVHW). See
Table 4-10 .
SFTRESET
0 - Last core reset was not a
reset triggered by software
1 - Last core reset was a reset
triggered by software, rather
than a hardware powerup reset
HWERRCAUSE[4:2]
See description under
bits[1:0], below.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
RO