MAX31785 MAXIM [Maxim Integrated Products], MAX31785 Datasheet - Page 32

• Manufacturer Part Number: MAX31785
• Description: 6-Channel Intelligent Fan Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

6-Channel Intelligent Fan Controller
Table 17. STATUS_WORD
32
The STATUS_BYTE command returns 1 byte of information with a summary of the most critical faults. A value of 1 indi-
cates that a fault or warning event has occurred and a 0 indicates otherwise. Bits for unsupported features are reported
as 0. The STATUS_BYTE cannot be restored by the RESTORE_DEFAULT_ALL command. The STATUS_BYTE message
content is described in Table 16. This command is read-only.
Table 16. STATUS_BYTE
The STATUS_WORD command returns 2 bytes of information with a summary of the reason for a fault. The low byte of
the STATUS_WORD is the same data as the STATUS_BYTE. Table 17 describes the STATUS_WORD message content.
The STATUS_VOUT command returns 1 byte of information with contents as described in Table 18.
Table 18. STATUS_VOUT
14:13
BIT
BIT
BIT
7:6
4:3
9:6
4:3
3:0
15
12
11
10
5
2
1
0
5
2
1
0
7
6
5
4
NONE OF THE ABOVE A fault or warning not listed in bits [7:1] has occurred.
NONE OF THE ABOVE A fault or warning not listed in bits [7:1] has occurred.
VOUT_OV_FAULT
VOUT_OV_WARN
VOUT_UV_FAULT
VOUT_UV_WARN
TEMPERATURE
TEMPERATURE
BIT NAME
BIT NAME
BIT NAME
VOUT_OV
VOUT_OV
VOUT
FANS
CML
MFR
CML
0
0
0
0
0
0
0
These bits always return a 0.
An overvoltage fault has occurred.
These bits always return a 0.
A temperature fault or warning has occurred.
A communication, memory, or logic fault has occurred.
An output voltage fault or warning has occurred.
These bits always return a 0.
A bit in STATUS_MFR_SPECIFIC has been set.
This bit always returns a 0.
A fan fault or warning has occurred.
These bits always return a 0.
An overvoltage fault has occurred.
These bits always return a 0.
A temperature fault or warning has occurred.
A communication, memory, or logic fault has occurred.
VOUT overvoltage fault.
VOUT overvoltage warning.
VOUT undervoltage warning.
VOUT undervoltage fault.
These bits always return a 0.
MEANING
MEANING
MEANING
STATUS_WORD (79h)
STATUS_VOUT (7Ah)
STATUS_BYTE (78h)