MAX16067 Datasheet, PDF (20/47 Pages) Maxim Integrated Products – 6-Channel, Flash-Configurable System Manager with Nonvolatile Fault Registers

6-Channel, Flash-Configurable System Manager
with Nonvolatile Fault Registers
Deglitch
Fault conditions are detected at the end of each conver-
sion. When the voltage on an input falls outside a moni-
tored threshold for one acquisition, the input multiplexer
remains on that channel and performs several succes-
sive conversions. To trigger a fault, the input must stay
outside the threshold for a certain number of acquisitions
as determined by the deglitch setting in r74h[6:5] (see
Table 15).
Fault Flags
Fault flags indicate the fault status of a particular input.
The fault flag of any monitored input in the device can be
read at any time from registers r1Bh and r1Ch, as shown
in Table 16. Clear a fault flag by writing a ‘1’ to the appro-
priate bit in the flag register. Unlike the fault signals sent
to the fault outputs, these bits are masked by the critical
fault enable bits (see Table 17). The fault flag is only set
when the matching enable bit in the critical fault enable
register is also set.
If GPIO6 is configured as the EXTFAULT input/output
and EXTFAULT is pulled low by an external circuit, bit
r1Ch[6] is set.
The SMB Alert (ALERT) bit is set if the MAX16067 has
asserted the SMBus Alert output. Clear by writing a ‘1’.
See the SMBALERT (ALERT) section for more details.
Table 15. Deglitch Configuration
REGISTER
ADDRESS
FLASH
ADDRESS
BIT RANGE
74h
274h
[6:5]
DESCRIPTION
Voltage comparator deglitch configuration
00 = 2 cycles
01 = 4 cycles
10 = 8 cycles
11 = 16 cycles
Table 16. Fault Flags
REGISTER
ADDRESS
1Bh
1Ch
BIT RANGE
[0]
[1]
[2]
[3]
[4]
[5]
[7:6]
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
MON1 undervoltage threshold
MON2 undervoltage threshold
MON3 undervoltage threshold
MON4 undervoltage threshold
MON5 undervoltage threshold
MON6 undervoltage threshold
Reserved
MON1 overvoltage threshold
MON2 overvoltage threshold
MON3 overvoltage threshold
MON4 overvoltage threshold
MON5 overvoltage threshold
MON6 overvoltage threshold
External fault (EXTFAULT)
SMB alert
DESCRIPTION
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