ISL8272MEVAL2Z datasheet(49/59 Pages) RENESAS

49 / 59 page

ISL8272M

FN8670 Rev.5.00

Page 49 of 59

Nov 8, 2017

SNAPSHOT (EAh)

Definition: A 32-byte read-back of parametric and status values. It allows monitoring and status data to be stored to flash following a

fault condition. In case of a fault, the last updated values are stored to the flash memory. When the SNAPSHOT STATUS bit is set stored,

device will no longer automatically capture parametric and status values following fault until stored data are erased. Use the

SNAPSHOT_CONTROL command to erase store data and clear the status bit before next ramp up. Data erased is not allowed when the

module is enabled.

Data Length in Bytes: 32

Data Format: Bit field

Type: Block Read

BLANK_PARAMS (EBh)

Definition: Returns a 16-byte string indicating which parameter values were either retrieved by the last RESTORE operation or have

been written since that time. Reading BLANK_PARAMS immediately after a restore operation allows the user to determine which

parameters are stored in that store. A one indicates the parameter is not present in the store and has not been written since the

RESTORE operation.

Data Length in Bytes: 16

Data Format: BIT

Type: Block Read

Default Value: FF…FFh

SNAPSHOT_CONTROL (F3h)

Definition: Writing a 01h will cause the device to copy the current SNAPSHOT values from NVRAM to the 32-byte SNAPSHOT command

parameter. Writing a 02h will cause the device to write the current SNAPSHOT values to NVRAM, and writing a 03h will erase all

SNAPSHOT values from NVRAM. Write (02h) and Erase (03h) may only be used when the device is disabled. All other values are

ignored.

Data Length in Bytes: 1

Data Format: Bit field

Type: R/W byte

BYTE NUMBER

VALUE

PMBUS COMMAND

FORMAT

31:23

Reserved

00h

Flash Memory Status Byte

FF - Not Stored

00 - Stored

N/A

BIT

Manufacturer Specific Status Byte

STATUS_MFR_SPECIFIC (80h)

Byte

CML Status Byte

STATUS_CML (7Eh)

Byte

Temperature Status Byte

STATUS_TEMPERATURE (7Dh)

Byte

Input Status Byte

STATUS_INPUT (7Ch)

Byte

IOUT Status Byte

STATUS_IOUT (7Bh)

Byte

VOUT Status Byte

STATUS_VOUT (7Ah)

Byte

15:14

Switching Frequency

READ_FREQUENCY (95h)

L11

13:12

Reserved

00h

11:10

Internal Temperature

READ_INTERNAL_TEMP (8Dh)

L11

9:8

Duty Cycle

READ_DUTY_CYCLE (94h)

L11

7:6

Highest Measured Output Current

N/A

L11

5:4

Output Current

READ_IOUT (8Ch)

L11

3:2

Output Voltage

READ_VOUT (8Bh)

L16u

1:0

Input Voltage

READ_VIN (88h)

L11

VALUE

DESCRIPTION

01h

Read SNAPSHOT values from NV RAM

02h

Write SNAPSHOT values to NV RAM

03h

Erase SNAPSHOT values stored in NV RAM.

ISL8272MEVAL2Z Datasheet(PDF) 49 Page - Renesas Technology Corp

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