AD9680 datasheet(89/99 Pages) AD

89 / 99 page

Data Sheet

AD9680

Rev. C | Page 87 of 97

Reg

Addr

(Hex)

Name

Bit 7

(MSB)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0 (LSB)

Default

Notes

0x245

Fast detect

(FD) control

(local)

Force

FD_A/

FD_B pins;

0 = normal

function;

1 = force

to value

Force value of

FD_A/FD_B

pins if force

pins is true,

this value is

output on FD

pins

Enable

fast detect

output

0x00

0x247

FD upper

threshold

LSB (local)

Fast detect upper threshold, Bits[7:0]

0x00

0x248

FD upper

threshold

MSB (local)

Fast detect upper threshold, Bits[12:8]

0x00

0x249

FD lower

threshold

LSB (local)

Fast detect lower threshold, Bits[7:0]

0x00

0x24A

FD lower

threshold

MSB (local)

Fast detect lower threshold, Bits[12:8]

0x00

0x24B

FD dwell

time LSB

(local)

Fast detect dwell time, Bits[7:0]

0x00

0x24C

FD dwell

time MSB

(local)

Fast detect dwell time, Bits[15:8]

0x00

0x26F

Signal

monitor

synchroniza-

tion control

Synchronization mode

00 = disabled

01 = continuous

11 = one shot

0x00

Refer to

the

Signal

Monitor

section

0x270

Signal

monitor

control (local)

Peak

detector

0 =

disabled

1 =

enabled

0x00

0x271

Signal

Monitor

Period

(local)

Signal monitor period, Bits[7:0]

0x80

In deci-

mated

output

clock

cycles

0x272

Signal

Monitor

Period

(local)

Signal monitor period, Bits[15:8]

0x00

In deci-

mated

output

clock

cycles

0x273

Signal

Monitor

Period

(local)

Signal monitor period, Bits[23:16]

0x00

In deci-

mated

output

clock

cycles

0x274

Signal

monitor

result control

(local)

Result

update

1 =

update

results

(self clear)

Result

selection

0 =

reserved

1 = peak

detector

0x01

0x275

Signal

Monitor

Result

(local)

Signal monitor result, Bits[7:0]

When Register 0x0274[0] = 1, Result Bits[19:7] = Peak Detector Absolute Value[12:0]; Result Bits[6:0] = 0

Read

only

Updated

based on

Reg.

0x274[4]

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