AD7771 datasheet(77/99 Pages) AD

77 / 99 page

AD7771

Data Sheet

Rev. 0 | Page 76 of 98

GPIO DATA REGISTER

Address: 0x018, Reset: 0x00, Name: GPIO_DATA

Value s ent to GPIO pins

Data read from GPIO pins

[7:6] RESERVED

[2:0] GPIO_WRITE_DATA (R/W)

[5:3] GPIO_READ_DATA (R)

Table 68. Bit Descriptions for GPIO_DATA

Bits

Bit Name

Settings

Description

Reset

Access

[7:6]

RESERVED

Reserved.

0x0

R/W

[5:3]

GPIO_READ_DATA

Data Read from the GPIO Pins

0x0

[2:0]

GPIO_WRITE_DATA

Value Sent to the GPIO Pins

0x0

R/W

BUFFER CONFIGURATION 1 REGISTER

Address: 0x019, Reset: 0x38, Name: BUFFER_CONFIG_1

Reference buffer pos itive enable

Reference buffer negative enable

[7] RESERVED

[0] RESERVED

[6] RESERVED

[1] RESERVED

[5] RESERVED

[2] RESERVED

[4] REF_BUF_POS_EN (R/W)

[3] REF_BUF_NEG_EN (R/W)

Table 69. Bit Descriptions for BUFFER_CONFIG_1

Bits

Bit Name

Settings

Description

Reset

Access

[7:5]

RESERVED

Reserved

0x0

R/W

REF_BUF_POS_EN

Reference Buffer Positive Enable

0x1

R/W

REF_BUF_NEG_EN

Reference Buffer Negative Enable

0x1

R/W

[2:0]

RESERVED

Reserved

0x0

R/W

BUFFER CONFIGURATION 2 REGISTER

Address: 0x01A, Reset: 0xC0, Name: BUFFER_CONFIG_2

Reference buffer pos itive precharge

enable

DRegCap Overdrive Enable.

Reference buffer negative precharge

enable

AReg2Cap Overdrive Enable

AReg1Cap Overdrive Enable

[7] REFBUFP_PREQ (R/W)

[0] PDB_DLDO_OVRDRV (R/W)

[6] REFBUFN_PREQ (R/W)

[1] PDB_ALDO2_OVRDRV (R/W)

[5:3] RESERVED

[2] PDB_ALDO1_OVRDRV (R/W)

Table 70. Bit Descriptions for BUFFER_CONFIG_2

Bits

Bit Name

Settings

Description

Reset

Access

REFBUFP_PREQ

Reference Buffer Positive Precharge Enable

0x1

R/W

REFBUFN_PREQ

Reference Buffer Negative Precharge Enable

0x1

R/W

[5:3]

RESERVED

Reserved

0x0

R/W

PDB_ALDO1_OVRDRV

AREG1CAP Overdrive Enable

0x0

R/W

PDB_ALDO2_OVRDRV

AREG2CAP Overdrive Enable

0x0

R/W

PDB_DLDO_OVRDRV

DREGCAP Overdrive Enable

0x0

R/W

AD7771 Datasheet(PDF) 77 Page - Analog Devices

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