Maxim Integrated MAX15301 PMBus Command Set - Manual (Page 20)

MAX15301 PMBus Command Set User’s Guide
Rev 1 Page 20 of 53
Fault Related Commands
CLEAR_FAULTS
Reference: Standard Command Lockable: Yes
Command Code: 0x03 Format: N/A
Data Bytes: 0 Units: N/A
Transfer: Send Byte Factory Value: N/A
Description/Notes: See Section 15.1 of the PMBus Specification Part II.
If the MAX15301 has latched off for a fault condition, sending the CLEAR_FAULTS command will cause
a restart.
VOUT_OV_FAULT_LIMIT
Reference: Standard Command Lockable: Yes
Command Code: 0x40 Format: Unsigned integer mantissa
Data Bytes: 2 Units: V
Transfer: Read/Write Word Factory Value: 0x0025 (see Description)
Description/Notes: See Section 15.2 of the PMBus Specification Part II.
VOUT_OV_FAULT_LIMIT mantissa data sent to and from the MAX15301 must be divided by 4096 to
determine the actual voltage value, according to the fixed value of
VOUT_MODE .
In the MAX15301, there are seven possible output voltage ranges based on seven corresponding
internal feedback divider taps. The MAX15301 hardware has 8-bit resolution for the overvoltage fault
limit within each of these seven ranges.
The desired value of VOUT_OV_FAULT_LIMIT is retained in memory, regardless of limitations
imposed by the feedback divider range and the 8-bit fault limit resolution, but the read-back value is
based on actual hardware register settings.
The factory value of 0x0025 (9mV) will be overridden during initialization to
VOUT_COMMAND x 1.15, unless a specific value has been written to the User Store.