VCT3834A datasheet(34/172 Pages) MICRONAS

34 / 172 page

VCT 38xxA

ADVANCE INFORMATION

Micronas

Table 2–4: I2C control and status registers of the video back-end

I2C Sub

address

Number

of bits

Mode

Function

Default

Name

1) priority mask register

If bit[x] is set to 1 then the function is active for the respective signal priority

Luminance Channel

h’61

w v

bit [5:0]

0..63/32

main picture contrast

32 CTM

h’65

w v

bit [5:0]

0..63/32

side picture contrast

32 CTS

h’51

w v

bit [8:0]

−256..255

main picture brightness

0 BRM

h’55

w v

bit [8:0]

−256..255

side picture brightness

0 BRS

h’75

w v

luma channel, priority mask register

bit [7:0]

0/1

select contrast, brightness, matrix

for main/side picture

0PBCT 1)

h’71

w v

luma channel, priority mask register

bit [7:0]

0/1

select main (video) / external (via CLUT)

RGB

0 PBERGB

Black-Level Expander

h’59

w v

black-level expander

bit [3:0]

0..15

tilt coefficient

bit [8:4]

0...31

amount

BLE1

BTLT

BAM

h’5d

w v

black-level expander, threshold:

bit [8:0]

0..511

disable expansion, threshold value

200

BLE2

BTHR

h’73

w v

black-level expander, measurement

bit[0]

0/1

50/60 Hz measurement windowlength

bit [8:1]

0..255

vstart/2

start line = vstart

stop line = 336/283

− vstart

or vertical blanking

BLE3

BWL

BVST

h’7d

w v

black-level expander, priority mask register

bit [7:0]

0/1

enable/disable black-level expander

0PBBLE 1)

Dynamic Peaking

h’69

w v

luma peaking filter, the gain at high frequencies and small signal

amplitudes is: 1 + (k1+k2)/8

bit [3:0]

0..15

k1: peaking level undershoot

bit [7:4]

0..15

k2: peaking level overshoot

bit [8]

0/1

peaking value normal/inverted

(peaking/softening)

PK1

PKUN

PKOV

PKINV

h’6d

w v

luma peaking filter, coring

bit [4:0]

0..31

coring level

bit [7:5]

reserved

bit [8]

0/1

peaking filter center frequency high/

low

PK2

COR

PFS

h’79

w v

luma peaking filter, priority mask register

bit [7:0]

0/1

disable/enable peaking transient

suppression when signal is switched

0 PBPK 1)

VCT3834A Datasheet(PDF) 34 Page - Micronas

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