AD9910SLASHPCBZ datasheet(54/60 Pages) AD

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AD9910

Rev. 0 | Page 54 of 60

Bit(s)

Descriptor

Explanation

0 = normal operation of the DRG accumulator (default).

Clear Digital Ramp

Accumulator

1 = asynchronous, static reset of the DRG accumulator. The ramp accumulator remains reset

as long as this bit remains set. This bit is synchronized with either an I/O update or a profile

change and the next rising edge of SYNC_CLK.

Clear Phase Accumulator

0 = normal operation of the DDS phase accumulator (default).

1 = asynchronous, static reset of the DDS phase accumulator.

Load ARR @ I/O Update

Ineffective unless Bits<9:8> = 112.

0 = normal operation of the OSK amplitude ramp rate timer (default).

1 = OSK amplitude ramp rate timer reloaded anytime I/O_UPDATE is asserted or a profile

change occurs.

OSK Enable

The Output Shift Keying Enable bit.

0 = OSK disabled (default).

1 = OSK enabled.

Select Auto OSK

Ineffective unless Bit 9 = 1.

0 = manual OSK enabled (default).

1 = automatic OSK enabled.

Digital Power-Down

This bit is effective without the need for an I/O update.

0 = clock signals to the digital core are active (default).

1 = clock signals to the digital core are disabled.

DAC Power-Down

0 = DAC clock signals and bias circuits are active (default).

1 = DAC clock signals and bias circuits are disabled.

REFCLK Input Power-Down

This bit is effective without the need for an I/O update.

0 = REFCLK input circuits and PLL are active (default).

1 = REFCLK input circuits and PLL are disabled.

Auxiliary DAC Power-Down

0 = auxiliary DAC clock signals and bias circuits are active (default).

1 = auxiliary DAC clock signals and bias circuits are disabled.

0 = assertion of the EXTPWRDN pin effects full power-down (default).

External Power-Down

Control

1 = assertion of the EXTPWRDN pin effects fast recovery power-down.

Not Available

0 = configures the SDIO pin for bidirectional operation; 2-wire serial programming

mode (default).

SDIO Input Only

1 = configures the serial data I/O pin (SDIO) as an input only pin; 3-wire serial

programming mode.

LSB First

0 = configures the serial I/O port for MSB-first format (default)

1 = configures the serial I/O port for LSB-first format.

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