CS5541

14

DS500PP1

2.8 Command Register Quick Reference

Notes: 23. After entering a Power Save Mode, the user must wait a minimum of 2 system clocks before issuing a

convert command.

24. A Power Save Mode cannot be entered by selectively setting the D5 bit.

0xAX must be written to the command register before the Sleep Mode will be enabled.

Similarly, 0xBX must be written to the command register before the Standby Mode will be enabled.

25. If Four Cycle Settling is selected (D3 = ’1’), the part will perform a one-time calibration when continuous

calibration is chosen.

D7(MSB)

D6

D5D4D3

D2D1

D0

CB

CH

PS

U/B

FS1

FS0

C1

C0

BIT

NAME

VALUE

FUNCTION

D7

Command Bit, CB

0

1

Reserved

Logic 1 for executable commands

D6

Channel Select, CH

0

1

Activate AIN1 for conversion

Activate AIN2 for conversion

D5

Power Save, PS

Notes 23, 24

0

1

Data Mode

Power Save Mode (Standby or Sleep)

D4

Unipolar/Bipolar, U/B

0

1

Bipolar Conversion Mode

Unipolar Conversion Mode

D3-D2

Filter Select, FS1-FS0

Note 25

00

01

10

11

Single Cycle Settling, 50/60 Hz Reject

Single Cycle Settling, No 50/60 Hz Reject

Four Cycle Settling, 50/60 Hz Reject

Four Cycle Settling, No 50/60 Hz Reject

D1-D0

Conversion Calibration

Select, C1-C0

00

01

10

11

Calibrate prior to each point

Perform a one time calibration

Use default calibration coefficients for conversions

Use existing calibration coefficients for conversion