Rainbow Electronics MAX16071 - Manual (Page 25)

12-Channel/8-Channel, Flash-Configurable System
Managers with Nonvolatile Fault Registers
MAX16070/MAX16071
______________________________________________________________________________________ 25
If a GPIO_ is configured as an open-drain EXTFAULT
input/output, and EXTFAULT is pulled low by an external
circuit, bit r1Ch[5] is set.
The SMB Alert bit is set if the MAX16070/MAX16071
have asserted the SMBus Alert output. Clear by writing a
‘1’. See SMBALERT section for more details.
Critical Faults
During normal operation, a fault condition can be con-
figured to store fault information in the flash memory by
setting the appropriate critical fault enable bits. Set the
appropriate critical fault enable bits in registers r6Eh to r72h
(see Table 14) for a fault condition to trigger a critical fault.
Logged fault information is stored in flash registers r200h
to r20Fh (see Table 15). After fault information is logged,
the flash is locked and must be unlocked to enable a
new fault log to be stored. Write a ‘0’ to r8Ch[1] to unlock
the fault flash. Fault information can be configured to
store ADC conversion results and/or fault flags in reg-
isters. Select the critical fault configuration in r6Dh[1:0].
Set r6Dh[1:0] to ‘11’ to turn off the fault logger. All stored
ADC results are 8 bits wide.
Table 14. Critical Fault Configuration (continued)
Table 15. Nonvolatile Fault Log Registers
REGISTER
ADDRESS
FLASH
ADDRESS
BIT
RANGE
DESCRIPTION
72h 272h
[0] 1 = Fault log triggered when MON9 is above/below the early threshold warning
[1] 1 = Fault log triggered when MON10 is above/below the early threshold warning
[2] 1 = Fault log triggered when MON11 is above/below the early threshold warning
[3] 1 = Fault log triggered when MON12 is above/below the early threshold warning
[4] 1 = Fault log triggered when overcurrent early threshold is exceeded
[5] Reserved, must be set to ‘1’
[7:6] Reserved
FLASH ADDRESS BIT RANGE DESCRIPTION
200h — Reserved
201h
[0] Fault log triggered on MON1
[1] Fault log triggered on MON2
[2] Fault log triggered on MON3
[3] Fault log triggered on MON4
[4] Fault log triggered on MON5
[5] Fault log triggered on MON6
[6] Fault log triggered on MON7
[7] Fault log triggered on MON8
202h
[0] Fault log triggered on MON9
[1] Fault log triggered on MON10
[2] Fault log triggered on MON11
[3] Fault log triggered on MON12
[4] Fault log triggered on overcurrent
[5] Fault log triggered on EXTFAULT
[7:6] Not used