PMBus 6-Channel Power-Supply Manager

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MFR_VOUT_PEAK (D4h)

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.

MFR_IOUT_PEAK (D5h)

The MFR_IOUT_PEAK command returns the maximum measured current. To reset this value to 0, write to this com-

mand 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.

MFR_TEMPERATURE_PEAK (D6h)

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.

MFR_VOUT_MIN (D7h)

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.

MFR_FAULT_RESPONSE (D9h)

The MFR_FAULT_RESPONSE command specifies the response to each fault condition supported by the device. In

response to a fault, the device always reports 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 22.

Table 22. MFR_FAULT_RESPONSE

Note 1: All enabled temperature sensor faults are logically ORed together.

Note 2: Temperature faults affect all enabled power supplies. Supplies that are designated as global all respond in the same

manner. This response is the worst-case response of the global channels for the given fault. Supplies that are not global

respond to a temperature fault based upon the programmed response for the particular supply.

Note 3: The fault response for a power-supply fault is determined by MFR_FAULT_RESPONSE for the faulting channel. If this

channel is part of a global group, this fault response is performed for all the global channels.

BIT

BIT NAME

MEANING

15

NV_LOG

0 = Do not log the fault into MFR_NV_FAULT_LOG.

1 = Log the fault into MFR_NV_FAULT_LOG.

14

GLOBAL

0 = Affect only the selected page power supply.

1 = Affect all supplies with GLOBAL = 1.

13

UV_OV_FILTER

0 = Fault on first voltage sample excursion occurrence.

1 = Requires two consecutive voltage sample excursions before a fault is

declared and action is taken.

12:10

0

These bits always return a 0.

9:8

IOUT_OC_FAULT_LIMIT_RESPONSE[1:0] See Table 23.

7:6

OT_FAULT_LIMIT_RESPONSE[1:0]

See Table 23 (see Notes 1 and 2).

5:4

TON_MAX_FAULT_LIMIT_RESPONSE[1:0] See Table 23.

3:2

VOUT_UV_FAULT_LIMIT_RESPONSE[1:0] See Table 23.

1:0

VOUT_OV_FAULT_LIMIT_RESPONSE[1:0] See Table 23.