Data Sheet

AD4684/AD4685

REGISTERS

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Rev. 0 | 30 of 32

Table 16. Bit Descriptions for CONFIGURATION2

Bits

Bit Name

Description

Reset

Access

8

SDO

SDO. Conversion results serial data output.

0x0

R/W

0: 2-wire—conversion data are output on both SDOA and SDOB/ALERT pins.

1: 1-wire—conversion data are output on SDOA pin only.

[7:0]

RESET

Reset. 0x3C—performs a soft reset. Refreshes some blocks. Register contents remain unchanged. Clears the

alert register and flushes any oversampling stored variables or active state machine. 0xFF—performs a hard reset.

Resets all possible blocks in the device. Register contents are set to defaults. All other values are ignored.

0x0

R/W

ALERT REGISTER

Address: 0x3, Reset: 0x0000, Name: Alert

Table 17. Bit Descriptions for Alert

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 bit indicates that the device configuration data did not load correctly on startup. This bit

does not clear on an alert register read. A hard reset via the CONFIGURATION2 register is required to clear this bit

and restart the device setup again.

0x0

R

0: no setup error.

1: setup error.

[7:6]

RESERVED

Reserved.

0x0

R

5

AL_B_HIGH

Alert B High. The alert indication high bits indicate 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.

4

AL_B_LOW

Alert B Low. The alert indication low bits indicate if a conversion result for the respective input channel exceeds

the value set in the ALERT_LOW_THRESHOLD register. This fault bit is sticky and remains set until the register is

read.

0x0

R

1: alert indication.

0: no alert indication.

[3:2]

RESERVED

Reserved.

0x0

R