ADPD4200 datasheet(83/93 Pages) AD

83 / 93 page

Data Sheet

ADPD4200

analog.com

Rev. 0 | 83 of 93

Table 31. Register Details

Addr

Name

Bits

Bit Name

Description

Reset

Access

0x1: use GPIO1 for time stamp.

Reserved

Reserved.

0x0

R/W

EXT_SYNC_EN

External Sync Enable. When enabled, use the GPIO selected by

EXT_SYNC_GPIO to trigger samples rather than the period counter.

0x0

R/W

[1:0]

EXT_SYNC_GPIO

External Synchronization GPIOx Select.

0x0

R/W

00: use GPIO0 for external synchronization

01: use GPIO1 for external synchronization.

0x00B4

IO_ADJUST

[15:4]

Reserved

Set to 0x005.

0x005

R/W

[3:2]

SPI_SLEW

Slew Control for SPI Pins.

0x0

R/W

0: slowest.

1: slow.

10: fastest.

11: fast.

[1:0]

SPI_DRV

Drive Control for SPI Pins.

0x0

R/W

0: medium.

1: weak.

10: strong.

11: strong.

TIME SLOT CONFIGURATION REGISTERS

Table 32. Register Details

Addr

Name

Bits

Bit Name

Description

Reset

Access

0x0100

TS_CTRL_A

SUBSAMPLE_x

Subsample using DECIMATE_FACTOR_x. When this bit is set, operate

the selected time slot only once per (DECIMATE_FACTOR_x + 1) time

slot sequences.

0x0

R/W

0x0120

TS_CTRL_B

0x0140

TS_CTRL_C

0x0160

TS_CTRL_D

CH2_EN_x

Channel 2 Enable.

0x0

R/W

0x0180

TS_CTRL_E

0: Channel 2 disabled.

0x01A0

TS_CTRL_F

1: Channel 2 enabled.

0x01C0

TS_CTRL_G

[13:12]

SAMPLE_TYPE_x

Time Slot x Sampling Type.

0x0

R/W

0x01E0

TS_CTRL_H

00: standard sampling modes.

0x0200

TS_CTRL_I

01: one-region digital integration mode.

0x0220

TS_CTRL_J

10: two-region digital integration mode.

0x0240

TS_CTRL_K

11: impulse response mode.

0x0260

TS_CTRL_L

[11:10]

INPUT_R_SELECT_x

Input Resistor (RIN) Select.

0x0

R/W

00: 500 Ω.

01: 6.25 kΩ.

10: reserved.

11: reserved.

[9:0]

TIMESLOT_OFFSET_x

Time Slot x Offset in 64 × Number of 1 MHz Low Frequency Oscillator

Cycles or 2 × Number of 32 kHz Low Frequency Oscillator Cycles.

0x0

R/W

0x0101

TS_PATH_A

[15:12]

PRE_WIDTH_x

Preconditioning Duration for Time Slot x. This value is in 2 μs increments.

A value of 0 skips the preconditioning state. Default is 8 μs.

0x4

R/W

0x0121

TS_PATH_B

0x0141

TS_PATH_C

0x0161

TS_PATH_D

[11:10]

Reserved

Write 0x0.

0x0

0x0181

TS_PATH_E

TS_GPIO_x

Time Slot Specific Value for Time Slot x. When GPIOOUTx is set to 0x10

and TS_GPIO_x is set to 1, the GPIO selected by GPIOOUTx outputs a 1

while the time slot selected by TS_GPIO_x is active. The GPIO returns to

the TS_GPIO_SLEEP value at the end of the time slot.

0x0

R/W

0x01A1

TS_PATH_F

0x01C1

TS _PATH_G

0x01E1

TS_PATH_H

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