AD9789BBCZ datasheet(30/76 Pages) AD

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AD9789

Rev. A | Page 30 of 76

Table 16. Interrupt Status/Clear Register (Address 0x04)

Bit

Name

Description

PARERR

If this bit is set to 1, one or more parity errors has occurred. Writing a 1 to this bit clears the interrupt.

BISTDONE

If this bit is set to 1, the BIST has reached the terminal state. Writing a 1 to this bit clears the interrupt.

PARMSET

If this bit is set to 1, the parameter update register (Address 0x24) has been updated. Writing a 1 to this bit clears

the interrupt.

PARMCLR

If this bit is set to 1, the parameter update register (Address 0x24) has been cleared. Writing a 1 to this bit clears

the interrupt.

LOCKACQ

If this bit is set to 1, proper data handoff between the digital engine and the DAC core is occurring.

LOCKLOST

If this bit is set to 1, proper data handoff between the digital engine and the DAC core has been lost. Writing a 1

to this bit clears the interrupt.

SATERR

If this bit is set to 1, one or more saturation errors (overflow into 16× interpolator) has occurred. Writing a 1 to

this bit clears the interrupt.

Reserved

Reserved.

Table 17. Channel Enable Register (Address 0x05)

Bit

Bit Name

Description

[7:4]

Reserved

Reserved.

[3:0]

CHANEN[3:0]

A Logic 1 in any bit position enables the corresponding channel; 0000 means that all channels are disabled.

Setting

Channels Enabled

0000

All channels disabled.

0001

Channel 0 enabled.

0010

Channel 1 enabled.

0011

Channel 0 and Channel 1 enabled.

…

1110

Channel 1, Channel 2, and Channel 3 enabled.

1111

All channels enabled.

Table 18. Bypass Register (Address 0x06)

Bit

Bit Name

Description

QAM

If this bit is set to 1, the QAM mappers are bypassed.

SRRC

If this bit is set to 1, the square root raised cosine (SRRC) filters are bypassed.

Reserved

Reserved.

[4:0]

INT[4:0]

A Logic 1 in any bit position bypasses the corresponding interpolation filter. The preferred order for bypassing

interpolation filters is to first bypass Filter 0, then Filter 1, and so on.

Setting

Interpolation Filters Bypassed

00000

All interpolation filters enabled.

00001

Interpolation Filter 0 bypassed.

00010

Interpolation Filter 1 bypassed.

00011

Interpolation Filter 0 and Interpolation Filter 1 bypassed.

…

01111

Interpolation Filter 0, Interpolation Filter 1, Interpolation Filter 2, and Interpolation Filter 3

bypassed.

…

11111

All interpolation filters bypassed.

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