ADM1266ACPZ-R7 datasheet(34/62 Pages) AD

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ADM1266

Data Sheet

Rev. A | Page 34 of 62

STANDARD PMBus COMMAND DESCRIPTIONS

All commands designated as Block WR/W consist of two writes and a read. A standard block write is performed to write to the

command, but the command must be written first before it can be read back.

STANDARD PMBus COMMANDS

Page

The page command provides the ability to configure, control, and monitor using only one physical address.

Table 12. Register 0x00—Page

Bits

Bit Name

Type

Description

[7:0]

PAGE

R/W

00000 = VH1.

00001 = VH2.

00010 = VH3.

00011 = VH4.

00100 = VP1.

00101 = VP2.

00110 = VP3.

00111 = VP4.

01000 = VP5.

01001 = VP6.

01010 = VP7.

01011 = VP8.

01100 = VP9.

01101 = VP10.

01110 = VP11.

01111 = VP12.

10000 = VP13.

Setting the page to 0xFF means that all following commands are to be applied to all inputs.

Operation

The operation command turns the closed-loop margining on and off, and determines which voltage to margin to.

Table 13. Register 0x01—Operation

Bits

Bit Name

R/W

Description

[7:6]

MARGIN_EN

R/W

01 is soft off, 10 is margin on, and others are reserved.

[5:4]

MARGIN_VOLTAGE

R/W

00 is VOUT_COMMAND (closed-loop servo to the voltage set in VOUT_COMMAND), 01 is margin

low, 10 is margin high, and others are reserved.

[3:2]

Fault

R/W

01 is ignore fault and others are reserved.

[1:0]

Reserved

Reserved.

CLEAR_FAULTS

The CLEAR_FAULTS command is a send byte, with no data. This command clears all fault bits in all PMBus status registers simultaneously.

Table 14. Register 0x03—CLEAR_FAULTS

Bits

Bit Name

Type

Description

Not Applicable

CLEAR_FAULTS

Send

Clears all bits in the PMBus status registers (Register 0x78 to Register 0x7A) simultaneously.

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