ADP1052ACPZ-R7 datasheet(30/113 Pages) AD

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ADP1052

Data Sheet

Rev. B | Page 30 of 113

POWER MONITORING, FLAGS, AND FAULT RESPONSES

The ADP1052 has extensive system and fault condition

monitoring capabilities for the sensed signals. The system

monitoring functions include current, voltage, power, and

temperature readings. The fault conditions include out-of-limit

values for current, voltage, power, and temperature. The limits

for the fault conditions are programmable, and flags are set

when the limits are exceeded.

FLAGS

The ADP1052 has an extensive set of flags, including the PMBus

standard flags and manufacturer specific flags that are set when

certain limits and thresholds are exceeded or certain conditions are

met. A setting of 1 indicates that a fault or warning event has

occurred. A setting of 0 indicates that a fault or warning event

has not occurred.

PMBus Standard Flags

Figure 33 shows a summary of the ADP1052 PMBus standard

fault status registers. The CLEAR_FAULTS command

(Register 0x03) clears all bits simultaneously in the PMBus status

registers (Register 0x78 to Register 0x7E).

Manufacturer Specific Flags

specific flags. These flags include the following (see the

Manufacturer Specific Fault Flag Registers section for details):

•

Housekeeping flags, such as

CHIP_PASSWORD_UNLOCKED, VDD_OV,

EEPROM_UNLOCKED, and CRC_FAULT.

•

Flags that can be programmed for protection responses, such

as CS3_OC_FAULT, FLAGIN, and SR_RC_FAULT.

•

Status flags, such as PGOOD, CONSTANT_CURRENT,

LIGHT_LOAD, SYNC_LOCKED, CHIP_ID, PULSE_SKIP-

PING, ADAPTIVE_DEAD_TIME, DEEP_LIGHT_LOAD,

modulation, and SOFT_START_FILTER.

VOUT_OV_FAULT

VIN_OV_FAULT

VOUT_OV_WARNING

VIN_OV_WARNING

VOUT_UV_WARNING

VIN_UV_WARNING

VOUT_UV_FAULT

VIN_UV_FAULT

VOUT_MAX WARNING

VOUT

VIN_LOW

TON_MAX_FAULT

IOUT

IIN_OC_FAST_FAULT

TOFF_MAX_WARNING

INPUT

IIN_OC_WARNING

VOUT TRACKING ERROR

MFR_SPECIFIC

PIN_OP_WARNING

POWER_GOOD

FANS

OTHER

UNKNOWN

IOUT_OC_FAULT

MANUFACTURER DEFINED

IOUT_OC_LV_FAULT

MANUFACTURER DEFINED

IOUT_OC_WARNING

MANUFACTURER DEFINED

IOUT_UC_FAULT

MANUFACTURER DEFINED

CURRENT SHARE FAULT

MANUFACTURER DEFINED

IN POWER LIMITING MODE

BUSY

MANUFACTURER DEFINED

POUT_OP_FAULT

POWER_OFF

MANUFACTURER DEFINED

POUT_OP_WARNING

VOUT_OV_FAULT

MANUFACTURER DEFINED

IOUT_OC_FAULT

VIN_UV_FAULT

TEMPERATURE

CML

7 OT_FAULT

NONE OF THE ABOVE

FAN 1 FAULT

6 OT_WARNING

FAN 2 FAULT

5 UT_WARNING

FAN 1 WARNING

4 UT_FAULT

FAN 2 WARNING

3 RESERVED

FAN 1 SPEED OVERRIDE

2 RESERVED

FAN 2 SPEED OVERRIDE

1 RESERVED

AIR FLOW FAULT

0 RESERVED

AIR FLOW WARNING

INVALID/UNSUPPORTED COMMAND

RESERVED

FAN 3 FAULT

INVALID/UNSUPPORTED DATA

RESERVED

FAN 4 FAULT

PACKET ERROR CHECK FAILED

INPUT A FUSE/BREAKER FAULT

FAN 3 WARNING

MEMORY FAULT DETECTED

INPUT B FUSE/BREAKER FAULT

FAN 4 WARNING

PROCESSOR FAULT DETECTED

INPUT A OR’ING DEVICE FAULT

FAN 3 SPEED OVERRIDE

RESERVED

INPUT B OR’ING DEVICE FAULT

FAN 4 SPEED OVERRIDE

OTHER COMMUNICATION FAULT

OUTPUT OR’ING DEVICE FAULT

RESERVED

OTHER MEMORY OR LOGIC FAULT

RESERVED

STATUS_OTHER

STATUS_IOUT (REG 0x7B)

STATUS_VOUT (REG 0x7A)

STATUS_TEMPERATURE (REG 0x7D)

STATUS_WORD (REG 0x79)

(UPPER BYTE OF STATUS_WORD)

STATUS_FANS_3_4

STATUS_INPUT (REG 0x7C)

STATUS_MFR_SPECIFIC

STATUS_FANS_1_2

STATUS_CML (REG 0x7E)

STATUS_BYTE (REG 0x78)

(LOWER BYTE OF STATUS_WORD)

Figure 33. Summary of the Fault Status Registers (Commands in Black are Supported; Commands in Gray are Not Supported)

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