AD7381-4

Data Sheet

Rev. 0 | Page 28 of 31

CONFIGURATION 2 REGISTER

Addressing

Reset

SDO

0

0

1

0

2

0

3

0

4

0

5

0

6

0

7

0

8

0

9

0

10

0

11

0

12

0

13

0

14

0

15

0

[15:12] ADDRESSING (R/W)

[7:0] RESET (R/W)

[11:10] RESERVED

[9:8] SDO (R/W)

Table 19. Bit Descriptions for Configuration 2 Register

Bits

Bit Name

Description

Reset

Access

[15:12]

ADDRESSING

Addressing. Bits[15:12] define the address of the relevant register. See the Addressing

Registers section for further details.

0x0

R/W

[11:10]

RESERVED

Reserved.

0x0

R

[9:8]

SDO

SDO. Conversion Results Serial Data Output

0x0

R/W

00: 2-wire. Conversion data are output on both SDOA and SDOB.

01: 1-wire. Conversion data are output on SDOA only.

10: 4-wire. Conversion data are output on SDOA, SDOB, SDOC, and SDOD/ALERT.

11: 1-wire. Conversion data are output on SDOA only.

[7:0]

RESET

Reset.

0x0

R/W

0x3C: performs a soft reset. Refreshes some blocks. Register contents remain unchanged.

Clears alert indication register and flushes any oversampling stored variables or active state

machine.

0xFF: performs a hard reset. Resets all possible blocks in the device. Registers contents are

set to defaults. All other values are ignored.

ALERT INDICATION REGISTER

Addressing.

Alert A Low.

Alert A High.

CRC Error.

Alert B Low.

Load Error.

Alert B High.

Alert D High.

Alert C Low.

Alert D Low.

Alert C High.

0

0

1

0

2

0

3

0

4

0

5

0

6

0

7

0

8

0

9

0

10

0

11

0

12

0

13

0

14

0

15

0

[15:12] ADDRESSING (R)

[0] AL_A_LOW (R)

[11:10] RESERVED

[1] AL_A_HIGH (R)

[9] CRCW_F (R)

[2] AL_B_LOW (R)

[8] SETUP_F (R)

[3] AL_B_HIGH (R)

[7] AL_D_HIGH (R)

[4] AL_C_LOW (R)

[6] AL_D_LOW (R)

[5] AL_C_HIGH (R)

Table 20. Bit Descriptions for Alert Indication Register

Bits

Bit Name

Description

Reset

Access

[15:12]

ADDRESSING

Addressing. Bits[15:12] define the address of the relevant register. See the Addressing

Registers section for further details.

0x0

R

[11:10]

RESERVED

Reserved.

0x0

R

9

CRCW_F

CRC Error. Indicates that a register write command failed due to a CRC error. This fault bit is

sticky and remains set until the register is read

0x0

R

0: no CRC error.

1: CRC error.

8

SETUP_F

Load Error. The SETUP_F indicates that the device configuration data did not load correctly

on startup. This bit does not clear on an alert indication register read. A hard reset via the

Configuration 2 register is required to clear this bit and restart the device setup again.

0x0

R

0: no setup error.

1: setup error.

7

AL_D_HIGH

Alert D High. The alert indication high bit indicates if a conversion result for the respective

input channel exceeds the value set in the alert high threshold register. This fault bit is sticky

and remains set until the register is read.

0x0

R

1: alert indication.

0: no alert indication.