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SERIAL DATA FORMAT

Standard Functionality

REGISTER DESCRIPTION

(2)

VSP1221

SLES012A – SEPTEMBER 2001 – REVISED JULY 2004

The serial data is always grouped in 16-bit blocks with the following format. Multiple 16-bit blocks can be send

through the SDIN pin (pin 47) keeping SLOAD (pin 46) low.

SD15

SD14

SD13

SD12

SD11

SD10

SD9

SD8

SD7

SD6

SD5

SD4

SD3

SD2

SD1

SD0

MSB

LSB

A4

A3

A2

A1

A0

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Register Address

Register Data

(1)

RD/WR = 0, Write into registers, RD/WR = 1, Read from registers

REGISTER ADDRESS

REGISTER NAME

REGISTER FUNCTION

A4

A3

A2

A1

A0

0

0

0

0

0

Control register

Mode control

0

0

0

0

1

PGA register

Gain control

0

0

0

1

0

User DAC1 register

User DAC1 control

0

0

0

1

1

User DAC2 register

User DAC2 control

0

0

1

0

0

Reserved

Reserved

0

0

1

0

1

Reserved

Reserved

0

0

1

1

0

OB register

OB level control

0

0

1

1

1

Blanking register

Blanking output control

0

1

0

0

0

Signal polarity register

Clock signal polarity control

0

1

0

0

1

Timing register 1

ADCCLK

0

1

0

1

0

Timing register 2

SHP

(2)

The register values are updated as soon as the register is written. It may take 0 to 9 ADCCLK cycles for it to have effect on the device.

10