Mips Technologies R4000 - Page 467

MIPS R4000 Microprocessor User's Manual 437
Error Checking and Correcting
Table 16-6 R4400 Fault History Bit Encoding
Boot/Reset
Controls
ModeIn Pin
Fault History
Bits
Fault* Pin
Master/Checker
Mode
VccOk just asserted
(goes from 0 to 1)
Used as
boot-mode
bits; scan
data
N/A N/A N/A
Reset* just
deasserted (goes
from 0 to 1)
N/A Cleared to 0 N/A N/A
Reset* deasserted
in normal operation
0
Set and latched,
if fault occurs
Live faults are
reported
N/A
Reset* deasserted
in normal operation
1 Cleared
Live faults are
reported
N/A
Reset* just asserted
(goes from 1 to 0)
N/A N/A N/A
Changed,
toggling
between mode
bits and Forced
Complete
Master
Reset* just asserted
(R4400 is reset)
0
Output Fault
History bit is
connected to the
Fault* pin
N/A N/A
Reset just asserted
(R4400 is reset)
1
Input Fault
History bit is
connected to
Fault* pin
N/A N/A