MAX31785ETL+ Maxim Integrated Products, MAX31785ETL+ Datasheet - Page 33

• 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

Table 21. STATUS_FANS_1_2
The STATUS_CML command returns 1 byte of information with contents as described in Table 19.
Table 19. STATUS_CML
The STATUS_MFR_SPECIFIC command returns 1 byte of information with a summary of the reason for a fault. The
STATUS_MFR_SPECIFIC message content is described in Table 20.
Table 20. STATUS_MFR_SPECIFIC
The STATUS_FANS_1_2 command returns 1 byte of information with the status of the fan. The STATUS_FANS_1_2
command is described in Table 21.
Note: The settings of the RED, ORANGE, YELLOW, and GREEN bits does not assert the ALERT signal.
BIT
BIT
BIT
5:1
3:0
7
6
0
7
6
5
4
7
6
5
4
3
2
1
0
FAULT_LOG_FULL
COMM_FAULT
FAN_1_FAULT
FAN_1_WARN
DATA_FAULT
WATCHDOG
BIT NAME
OT_FAULT
BIT NAME
BIT NAME
OT_WARN
ORANGE
YELLOW
GREEN
RED
0
0
0
0
0
6-Channel Intelligent Fan Controller
Fan 1 fault.
This bit always returns a 0.
Fan 1 warning.
This bit always returns a 0.
The lower nibble reports the estimated health of the fan. Only one of the four bits is set at any
one time. If no bits are set, the fan health cannot be estimated. RED is the worst health state
and GREEN is the best health state. The CLEAR_FAULTS command does not affect these
bits.
An invalid or unsupported command has been received.
An invalid or unsupported data has been received.
These bits always return a 0.
MFR_NV_FAULT_LOG is full and needs to be cleared.
This bit always returns a 0.
Overtemperature warning.
Overtemperature fault.
A watchdog reset has occurred.
These bits always return a 0.
MEANING
MEANING
MEANING
STATUS_MFR_SPECIFIC (80h)
STATUS_FANS_1_2 (81h)
STATUS_CML (7Eh)
33