ADP1048ARQZ-R7 datasheet(46/84 Pages) AD

46 / 84 page

ADP1047/ADP1048

Data Sheet

Rev. 0 | Page 46 of 84

RESTORE_USER_ALL COMMAND

Code 0x16, send byte, no data. This command downloads the stored user settings from EEPROM into operating memory.

CAPABILITY REGISTER

This register allows host systems to determine the capabilities of the PMBus device.

Table 20. Register 0x19—CAPABILITY

Bits

Bit Name

R/W

Description

Packet error

checking

Always reads as 0. Packet error checking (PEC) is not supported.

[6:5]

Maximum bus

speed

Return the device PMBus speed capability. These bits are hardcoded to a value of 01 (use the

400 kHz maximum bus speed).

SMBALERT#

Always reads as 0. SMBALERT# pin and SMBus alert response protocol not supported.

[3:0]

RSVD

Reserved.

VOUT_MODE REGISTER

This register sets and reads the format (linear, VID, direct) and exponents for VOUT related commands.

Table 21. Register 0x20—VOUT_MODE

Bits

Bit Name

R/W

Description

[7:5]

Mode

Return the output voltage data format. This bit is hardcoded to use linear format.

[4:3]

RSVD

Reserved.

[2:0]

Exponent

R/W

Specify the exponent (N) used in VOUT linear mode format (X = Y × 2N). The exponent is in twos

complement format.

VOUT_COMMAND REGISTER

This register sets VOUT to the configured value.

Table 22. Register 0x21—VOUT_COMMAND

Bits

Bit Name

R/W

Description

[15:12]

RSVD

Reserved. Always reads as 0000.

[11:0]

Mantissa

R/W

Mantissa (Y[11:0]) used in VOUT linear mode format (X = Y × 2N).

VOUT_SCALE_LOOP REGISTER

This register sets the K factor = VADC/VOUT.

Table 23. Register 0x29—VOUT_SCALE_LOOP

Bits

Bit Name

R/W

Description

[15:11]

Exponent

R/W

Write the exponent (N) in twos complement format for K = Y × 2N.

RSVD

Always reads as 0.

[9:0]

Mantissa

R/W

Mantissa (Y[9:0]) used in K linear mode format (K = Y × 2N).

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