AD7321

Data Sheet

Rev. B | Page 24 of 36

Table 11. Power Mode Selection

PM1

PM0

Description

1

1

Full Shutdown Mode. In this mode, all internal circuitry on the AD7321 is powered down. Information in the control register

is retained when the AD7321 is in full shutdown mode.

1

0

All internal circuitry is powered down in autoshutdown.

0

1

Autostandby Mode. In this mode, all internal circuitry is powered down, excluding the internal reference. The AD7321 enters

0

0

Normal Mode. All internal circuitry is powered up at all times.

Table 12. Sequencer Selection

Seq1

Seq2

Description

0

0

The channel sequencer is not used. The analog channel, selected by programming the ADD0 bit in the control register,

selects the next channel for conversion.

1

0

This configuration is used in conjunction with the channel address bit in the control register. This allows continuous

conversions on a consecutive sequence of channels, from Channel 0 through a final channel selected by the channel

address bit in the control register. The range for each channel defaults to the range previously written into the range

register.

1

1

The channel sequencer is not used. The analog channel, selected by programming the ADD0 bit in the control register,

selects the next channel for conversion.