FEATURES GENERAL DESCRIPTION

 Supports Embedded DisplayPort (eDP) Specification

version 1.2.

 Support 4 Main Link Lanes at either 1.62Gb/s or

2.7Gb/s link rate

 Supports input color depth 6/8/10-bit per pixel in RGB

format

 Support VESA and CEA timing standards up to

QSXGA 2560x2048 @ 60Hz or 4Kx2K@24/30Hz for

2D, and Full HD 1920x1080 @120Hz for 3D(L/R eye

frame at 60Hz each), with 10 bit graphic color depth

 Support eDP Authentication: Alternative Scramble Seed

Reset (ASSR) and Alternative Framing

 Support Single Port, Dual Port and Quad port LVDS

output interface with 6/8/10-bit color depth up to

400MHz pixel rate

 Support both OpenLDI (or JEIDA), SPWG (or VESA)

and non-JEITA (10-bit only) bit mapping for LVDS

application

 Flexible LVDS output pins swapping

 2 channel IIS/ S/PDIF audio output

 Support Dynamic Backlight luminance Control by the

command through AUX channel, or through the

interface of PWM in/out and Backlight Brightness

Control (OSD display)

 Support PWM bypass through and on-chip PWM

generation

 Black panel during invalid input

 Support Panel selection function with external hardware

configuration

 Initiated and controlled by firmware which is loaded

from External BOOT ROM automatically upon power

up.

 BOOT ROM data updated through I2C bus or AUX

Channel

 Support dynamic refresh rate (DDR) switching

 Supports Enhanced Framing Mode

 3 work modes: connect 27MHz crystal, inject 27MHz

or 14.318MHz clock

 Programmable LCD panel power sequence

 Hot Plug Detection

 Support chip power down by GPIO pin

 Support power management mechanism through AUX

Channel

 EMI reduction capability for DP input and LVDS

output. Spread spectrum control is available for

transmitting LVDS signal

 Achieve bit error rate <10-9

for raw transport data per

lane and symbol error rate <10-12 for control data

 Low power consumption

 Offered in a 128-pin TQFP package (14 x 14mm)

Chrontel’s CH7515 is a low-cost, low-power

semiconductor device that translates the Embedded

DisplayPort signal to the LVDS. This innovative eDP

receiver with integrated 4 channel LVDS transmitters is

specially designed to target the All-In-One PC and the

terminal display devices with large size panel market

segments. Leveraging the DisplayPort’s unique

source/sink “Link Training” routine, the CH7515 is

capable of instantly bring up the video display to the LCD

when the initialization process is completed between

CH7515 and the graphic chip.

The CH7515 is designed to meet the Embedded

DisplayPort Specification version 1.2. The 4 eDP Main

Link Lanes receiver supports input with data rate running

at either 1.62Gb/s or 2.7Gb/s, and can accept digital RGB

signal for LVDS output up to QSXGA 2560x2048@60Hz

or 4Kx2K@24/30Hz. With advanced 3D processing

module integrated, The CH7515 can support up to

1920x1080@120Hz 3D display mode, with

programmable emitter control signal and 3D LCD panel’s

backlight control signal output.

The Backlight Enable control and the PWM are the two

kinds of backlight control functions designed in the

CH7515 Panel power control module. The brightness

control commands sent through AUX Channel can be

dynamically translated by CH7515 and converted into

LCD backlight control signal. Alternatively, the

brightness control commands can be input from the PWM

in and GOIO pin of Backlight Brightness Control. The

CH7515 will save the last setting of brightness level into

the external BOOT ROM and restore it upon power up.

The CH7515 can dynamically adjust backlight brightness

according to video stream to save power consumption and

it supports OSD display in this way.

The CH7515 will immediately convert the Embedded

DisplayPort signal to LVDS output after DisplayPort

Link Training is completed. This feature can be achieved

by loading the panel’s EDID and the CH7515’s

configuration settings in the serial external BOOT ROM

connected to the CH7515. During system power-up and

upon completion of the DisplayPort Link Training

through AUX Channel, CH7515 will generate LVDS

signal according to the panel power-up timing sequencing

stored in the external BOOT ROM.

An advanced Power Management Unit (PMU) is

incorporated in CH7515, which is specially designed to

reduce power consumption in normal operation.