Datasheet

Data Sheet AD7329

Rev. B | Page 27 of 40

Table 13. Power Mode Selection

PM1 PM0 Description

1 1

Full shutdown mode. In this mode, all internal circuitry on the AD7329 is powered down. Information in the control register

is retained when the AD7329 is in full shutdown mode.

1 0

Autoshutdown mode. The AD7329 enters autoshutdown on the 15

SCLK rising edge when the control register is updated.

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 AD7329

enters autostandby mode on the 15

SCLK rising edge after the control register is updated.

0 0 Normal mode. All internal circuitry is powered up at all times.

Table 14. Sequencer Selection

SEQ1 SEQ2 Description

0 0

The channel sequencer is not used. The analog channel, selected by programming the ADD2 to ADD0 bits in the control

0 1

Uses the sequence of channels that were previously programmed in the sequence register for conversion. The AD7329

starts converting on the lowest channel in the sequence. The channels are converted in ascending order. If uninterrupted,

the AD7329 keeps converting the sequence. The range for each channel defaults to the range previously written into the

corresponding range register.

1 0

This configuration is used in conjunction with the channel address bits 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 bits in the control register. The range for each channel defaults to the range previously written into the

corresponding range register.

1 1

The channel sequencer is not used. The analog channel, selected by programming the ADD2 bit to ADD0 bit in the control