TLV986

3-V, 10-BIT, 12.5 MSPS, AREA CCD SENSOR PROCESSOR

SLAS228 – JULY 1999

9

POST OFFICE BOX 655303

REGISTER DEFINITION

serial input data format

DI15

DI14

DI13

DI12

DI11

DI10

DI9

DI8

DI7

DI6

DI5

DI4

DI3

DI2

DI1

DI0

X

X

A3

A2

A1

A0

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

A3

A2

A1

A0

D9 – D0

0

0

0

0

Control register

10-bit data to be written into the selected register

0

0

0

1

PGA gain register

0

0

1

0

User DAC1 register

0

0

1

1

User DAC2 register

0

1

0

0

Coarse offset DAC

0

1

0

1

Fine offset DAC

0

1

1

0

Digital Vb register (set reference code level at the ADc output during the optical black interval)

0

1

1

1

Optical black register (set the number of black pixels per line and number of the lines for digital averaging)

1

0

0

0

Test register

control register format

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

STBY

PDD1

PDD2

ACD

AFD

X

X

X

RTOB

RTSY

control register description

BIT

NAME

DESCRIPTION

D9

STBY

Device power down control: 1 = standby, 0 = active (default)

D8

PDD1

Power down the user DAC1: 1 = standby, 0 = active (default)

D7

PDD2

Power down the user DAC2: 1 = standby, 0 = active (default)

D6

ACD

Coarse offset DAC mode control:

0 = Auto calibration (default),

1 = Bypass auto calibration

Note: When D6 is set to 0, D5 must also be set to 0 (automode). Otherwise, the automode will be

disabled on both offset DACs.

D5

AFD

Fine offset DAC mode control:

0 = Auto calibration (default),

1 = Bypass auto calibration.

Note: D5 can be set to 0 with or without the D6 being set to 0.

D4 – D2

X

Reserved

D1

RTOB

Write 1 to this bit will reset calculated black-level results in the digital averager.

D0

RTSY

#Write 1 to this bit will rewet entire system to the default settings.

PGA register format

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

X

BIT8

BIT7

BIT6

BIT5

BIT4

BIT3

BIT2

BIT1

BIT0

Default PGA gain = X000000000 or 0 dB

user DAC1 and DAC2 registers format

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

S

S

BIT7

BIT6

BIT5

BIT4

BIT3

BIT2

BIT1

BIT0

Default user DAC register value = XX00000000