AD7779 datasheet(68/97 Pages) AD

68 / 97 page

AD7779

Data Sheet

Rev. 0 | Page 68 of 97

Bits

Bit Name

Settings

Description

Reset

Access

[1:0]

SOFT_RESET

Soft Reset

0x0

R/W

No effect

2nd write

1st write

GENERAL USER CONFIGURATION 2 REGISTER

Address: 0x012, Reset: 0x09, Name: GENERAL_USER_CONFIG_2

SYNC pulse generated thru SPI

STARTb pin in the control module.

This bit is ANDed with the value on

generate a pulse in /SYNC_IN pin.

on STARTb pin in the control m odule,

This s ignal is ANDed with the value

DOUT Drive Strength

11: Extra Strong.

10: Weak.

01: Strong.

00: Nom inal.

Sets SPI interface to read back SAR

result on SDO

SDO Drive Strength

11: Extra Strong.

10: Weak.

01: Strong.

00: Nom inal.

[7] RESERVED

[0] SPI_SYNC (R/W)

[6] RESERVED

[2:1] DOUT_DRIVE_STR (R/W)

[5] SAR_DIAG_MODE_EN (R/W)

[4:3] SDO_DRIVE_STR (R/W)

Table 62. Bit Descriptions for GENERAL_USER_CONFIG_2

Bits

Bit Name

Settings

Description

Reset

Access

[7:6]

RESERVED

Reserved.

0x0

R/W

SAR_DIAG_MODE_EN

Sets SPI Interface to Read Back SAR Result on SDO.

0x0

R/W

[4:3]

SDO_DRIVE_STR

SDO Drive Strength.

0x1

R/W

Nominal.

Strong.

Weak.

Extra strong.

[2:1]

DOUT_DRIVE_STR

DOUTx Drive Strength.

0x0

R/W

Nominal.

Strong.

Weak.

Extra strong.

SPI_SYNC

SYNC Pulse Generated Through SPI.

0x1

R/W

This signal is AND’ed with the value on the START pin in the control module

and generates a pulse in the SYNC_IN pin.

This bit is AND’ed with the value on START pin in the control module.

AD7779 Datasheet(PDF) 68 Page - Analog Devices

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