AD9250 datasheet(40/45 Pages) AD

40 / 45 page

AD9250

Data Sheet

Rev. E | Page 40 of 45

Reg

Addr

(Hex)

Name

Bit 7

(MSB)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0 (LSB)

Default

Notes

0x5F

204B Link

CTRL 1

Tail bits: If

CS bits

are not

enabled;

0 = extra

bits are 0;

1 = extra

bits are 9-

bit PN

JESD204B

test

sample

enabled

Reserved;

set to 1

ILAS mode;

01 = ILAS normal mode

enabled;

11 = ILAS always on, test

mode

Reserved;

set to 0

Power-

down

JESD204B

link; set

high while

configuring

link

parameters

0x14

0x60

204B Link

CTRL 2

Reserved;

set to 0

Reserved;

set to 0

Reserved;

set to 0

Invert

logic of

JESD204B

bits

0x00

0x61

204B Link

CTRL 3

Reserved;

set to 0

Reserved;

set to 0

Test data injection point;

01 = 10-bit data at

8B/10B output;

10 = 8-bit data at

scrambler input

JESD204B test mode patterns;

0000 = normal operation (test mode disabled);

0001 = alternating checker board;

0010 = 1/0 word toggle;

0011 = PN sequence PN23;

0100 = PN sequence PN9;

0101= continuous/repeat user test mode;

0110 = single user test mode;

0111 = reserved;

1000 = modified RPAT test sequence, must be used

with JTX_TEST_GEN_SEL = 01 (output of 8b/10b);

1100 = PN sequence PN7;

1101 = PN sequence PN15;

other setting are unused

0x00

0x62

204B Link

CTRL 4

Reserved

0x00

0x63

204B Link

CTRL 5

Reserved

0x00

0x64

204B DID

config

JESD204B DID value

0x00

0x65

204B BID

config

JESD204B BID value

0x00

0x66

204B LID

Config 0

Lane 0 LID value

0x00

0x67

204B LID

Config 1

Lane 1 LID value

0x01

0x6E

204B

parameters

SCR/L

JESD204B

scrambling

(SCR);

0 =

disabled;

1 =

enabled

JESD204B

lanes (L);

0 = 1 lane;

1 = 2 lanes

0x81

0x6F

204B

parameters

JESD204B number of octets per frame (F); calculated value

(Note that this value is in x − 1 format)

0x01

Read

Only

0x70

204B

parameters

JESD204B number of frames per multiframe (K); set value of K per JESD204B specifications, but also must be a

multiple of 4 octets

(Note that this value is in x − 1 format)

0x1F

0x71

204B

parameters

JESD204B number of converters (M);

0 = 1 converter;

1 = 2 converters

0x01

0x72

204B

parameters

CS/N

Number of control bits

(CS);

00 = no control bits

(CS = 0);

01 = 1 control bit

(CS = 1);

10 = 2 control bits

(CS = 2)

ADC converter resolution (N),

0xD = 14-bit converter (N = 14)

(Note that this value is in x − 1 format)

0x0D

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