Data Sheet

AD7383-4/AD7384-4

REGISTERS

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Rev. 0 | 29 of 33

Table 19. Bit Descriptions for CONFIGURATION1 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

OS_MODE

Oversampling Mode. Sets the oversampling mode of the ADC.

0x0

R/W

0: normal averaging.

1: rolling average.

[8:6]

OSR

Oversampling Ratio. Sets the oversampling ratio for all the ADCs in the relevant mode. Normal averaging mode

supports oversampling ratios of 2×, 4×, 8×, 16×, and 32×. Rolling average mode supports oversampling ratios of

2×, 4×, and 8×.

0x0

R/W

000: disabled.

001: 2×.

010: 4×.

011: 8×.

100: 16×.

101: 32×.

110: disabled.

111: disabled.

5

CRC_W

CRC Write. Controls the CRC functionality for the SDI interface When setting this bit from a 0 to a 1, the command

must be followed by a valid CRC to set this configuration bit. If a valid CRC is not received, the entire frame is

ignored. If the bit is set to 1, it requires a CRC to clear it to 0.

0x0

R/W

0: no CRC function.

1: CRC function.

4

CRC_R

CRC Read. Controls the CRC functionality for the SDOx interface.

0x0

R/W

0: no CRC function.

1: CRC function.

3

ALERT_EN

Enable Alert Indicator Function. This bit functions when the SDO bit = 01. Otherwise, the ALERT_EN bit is

ignored.

0x0

R/W

0: SDOB.

1: ALERT.

2

RES

Resolution. Sets the size of the conversion result data. If OSR = 0, the RES bit is ignored, and the resolution is set

to default resolution.

0x0

R/W

0: normal resolution.

1: 2-bit higher resolution.

1

REFSEL

Reference Select. Selects the ADC reference voltage source.

0x0

R/W

0: selects internal reference.

1: selects external reference.

0

PMODE

Power-Down Mode. Sets the power modes.

0x0

R/W