MAX31785ETL+ Maxim Integrated Products, MAX31785ETL+ Datasheet - Page 36

• Manufacturer Part Number: MAX31785ETL+
• Description: Board Mount Temperature Sensors 6Ch Intelligent Fan Controller
• Manufacturer: Maxim Integrated Products

Specifications of MAX31785ETL+

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6-Channel Intelligent Fan Controller
The MFR_VOUT_PEAK command returns the maximum actual measured output voltage. To reset this value to 0, write to this
command with a data value of 0. Any values written to this command are used as a comparison for future peak updates. The
2 data bytes are in DIRECT format.
The MFR_TEMPERATURE_PEAK command returns the maximum measured temperature. To reset this value to its low-
est value, write to this command with a data value of 8000h. Any other values written by this command are used as a
comparison for future peak updates. The 2 data bytes are in DIRECT format.
The MFR_VOUT_MIN command returns the minimum actual measured output voltage. To reset this value, write to this com-
mand with a data value of 7FFFh. Any values written to this command are used as a comparison for future minimum updates.
The 2 data bytes are in DIRECT format.
The MFR_FAULT_RESPONSE command specifies the response to each fault condition supported by the device. In
response to a fault, the device always report the fault in the appropriate status register and asserts the ALERT output
(if enabled in MFR_MODE). A CML fault cannot cause any device action other than setting the status bit and asserting
the ALERT output. The MFR_FAULT_RESPONSE command is described in Table 23.
Note 1: For fault responses, a fault is defined as either a fan fault, an overtemperature fault, or an undervoltage fault. Bits 2 and 6
Note 2:
36
Table 23. MFR_FAULT_RESPONSE
BIT
4:3
7
6
5
2
1
0
allow the addition of an overvoltage fault to the fault definition.
If FAULT_PIN_MONITOR = 1, the device reacts to both internal and external assertions of the FAULT pin.
FAULT_PIN_ENABLE_OV
FAULT_PIN_MONITOR
FAULT_PIN_ENABLE
UV_OV_FILTER
NV_LOG_OV
BIT NAME
NV_LOG
0
0 = Do not log the fault into MFR_NV_FAULT_LOG.
1 = Log the fault into MFR_NV_FAULT_LOG.
This bit is only valid for pages 17 to 22. Other pages always return a 0.
0 = Bit 7 is ignored for overvoltage faults.
1 = Bit 7 also applies to overvoltage faults.
This bit is only valid for pages 17 to 22. Other pages always return a 0.
0 = Fault or warning on first voltage sample excursion occurrence.
1 = Requires two consecutive voltage sample excursions before a fault or warning
is declared and action taken.
These bits always return a 0.
This bit is only valid for pages 17 to 22. Other pages always return a 0.
0 = Bit 1 is ignored for overvoltage faults.
1 = Bit 1 also applies to overvoltage faults.
0 = Never assert the FAULT pin.
1 = Assert the FAULT pin during an active fault.
This bit is only valid for pages 0 to 5. Other pages always return a 0.
0 = Ignore the FAULT pin.
1 = Force fan to 100% PWM duty cycle when the FAULT pin is asserted.
MFR_TEMPERATURE_PEAK (D6h)
MEANING
MFR_FAULT_RESPONSE (D9h)
MFR_VOUT_PEAK (D4h)
MFR_VOUT_MIN (D7h)