KA2506-01 데이터 시트보기 (PDF) - Samsung

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KA2506-01

I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS

Samsung 

I2C BUS CONTROLLED R/G/B VIDEO AMPLIFIER FOR MONITORS

KA2506-01

FUNCTIONAL DESCRIPTION

Contrast (OSD Contrast Adjustment) (8-bits)

The contrast adjustment is made by controlling simultaneously the gain of three internal variable gain amplifiers

through the I2C bus interface.

The contrast adjustment allows you to cover a typical range of 38dB.

Brightness Adjustment (8-bits)

The brightness adjustment controls to add the same black level (pedestal) to the 3-channel/R/G/B signals after

contrast amplifier by I2C BUS.

Cut-Off Brightness Adjustments (8-bits)

The Cut-Off Brightness adjustment is made by simultaneously controlling the external cut-off current.

Cut-Off(SUB Contrast) Adjustment (8-bits × 3)

These adjustments are used to adjust the white balance, and the gain of each channel is controlled by I2C BUS.

The SUB contrast adjustment allows you to cover a typical range of 11dB.

OSD Inputs

The KA2506 includes all the circuitry necessary to mix OSD signals into the R/G/B video signal.

You need 4 pins for this function. (R/G/B OSD, OSD blanking)

Serial Interface

The 2-wires serial interface is an I2C BUS interface.

The slave address of the KA2506 is DC (hexadecimal)

Bit8

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

1

1

0

1

1

1

0

0 (W)

Data Transfer

All bytes are sent MSB (Most Significant Bit) bit first and the write data transfer is closed by a stop.

The MCU can write data into the KA2506 registers. To do that, after a start, the MCU must send:

- The I2C address slave byte with a low level for R/W bit (bit1)

- The byte of the interinal register address where the MCU wants to write data (SUB Address)

- The data

- Stop

I2C BUS Write Operation

SCL

transter

MSB

SDA

START

Slave address

LSB

ACK

Register address

ACK

Data byte

ACK

STOP

15

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