AD6624ASSLASHPCB datasheet(27/40 Pages) AD

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AD6624A

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Table VIII. Channel Address Memory Map

Ch Address

Bit Width

Comments

00–7F

Coefficient Memory (CMEM)

128

× 20-Bit Memory

CHANNEL SLEEP

SLEEP Bit from EXT_ADDRESS 3

Soft_Sync Control Register

Hop

Start

Pin_SYNC Control Register

First SYNC Only

Hop_En

Start_En

Start Hold-Off Counter

Start Hold-Off Value

NCO Frequency Hold-Off Counter

NCO_FREQ Hold-Off Value

NCO Frequency Register 0

NCO_FREQ[15:0]

NCO Frequency Register 1

NCO_FREQ[31:16]

NCO Phase Offset Register

NCO_PHASE[15:0]

NCO Control Register

8–7:

SYNC Input Select[1:0]

WB Input Select B/A

5–4:

Input Enable Control

11:

Clock On IEN Transition to Low

10:

Clock On IEN Transition to High

01:

Clock On IEN High

00:

Mask On IEN Low

Clear Phase Accumulator On HOP

Amplitude Dither

Phase Dither

Bypass (A-Input -> I-Path, B -> Q)

89–8F

Unused

rCIC2 Decimation – 112

MrCIC2–1

rCIC2 Interpolation – 19

LrCIC2–1

rCIC2 Scale

11:

Exponent Invert

10:

Exponent Weight

9–5:

rCIC2_QUIET[4:0]

4–0:

rCIC2_LOUD[4:0]

Reserved

Reserved (Must Be Written Low)

CIC5 Decimation –18

MCIC5–1

CIC5 Scale

4–0:

CIC5_SCALE[4:0]

Reserved

Reserved (Must Be Written Low)

97–9F

Unused

RCF Decimation – 18

MRCF–1

RCF Decimation Phase

PRCF

RCF Number of Taps –18

NTAPS–1

RCF Coefficient Offset

CORCF

RCF Control Register

10:

RCF Bypass BIST

RCF Input Select (Own 0, Other 1)

Program RAM Bank 1/0

Use Common Exponent

Force Output Scale

5–4:

Output Format

1x:

Floating Point 12 + 4

01:

Floating Point 8 + 4

00:

Fixed Point

3–0: Output Scale

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