ST STDP3100 User Manual

STDP3100

DisplayPort to VGA converter

Data Brief

Features

■ Two lane DisplayPort™ 1.1a receiver

■ Triple 10-bit video DAC

– 162 MSPS throughput rate – VSIS compatible – RGB output with 0 to 700mV range

■ 3.3V HSYNC, VSYNC

■ Resolution through WUXGA

■ EDID, MCCS pass-through support

■ 3.3V DDC output signals

27 MHz

Crystal

Clock

Generator

SPI Flash

SPI

Controller

OCM

■ Sink detection logic

■ Low power operation – Active 400mW, standby

mode 15mW

■ Package: 64-pin LQFP, 10 x 10 mm

Applications

■ DisplayPort to VGA dongle as an attachment to

Notebook and Desktop PCs

■ DisplayPort to VGA conversion for Notebook

and Desktop PC motherboard applications

Reset

Circuit

GPIO

AUX

HPD

2 Lane

DisplayPort

Receiver

Pattern

Generator

HSYNC, VSYNC

Gen

DAC 10-bit color

DDC

HSYNC

VSYNC

Red

Green

Blue

DDC SDA

DDC SCL

November 2008 Rev 1 1/7

For further information contact your local STMicroelectronics sales office.

www.st.com

Description STDP3100

1 Description

STDP3100 is a DisplayPort to VGA signal format converter for interfacing next generation DisplayPort based PC and notebook computers with conventional VGA displays, such as CRT, LCD monitors, and projectors. DisplayPort offers a unified, scalable, and cost effective interface for embedded and external display applications. As desktop and notebook PCs are increasingly transitioning from conventional analog type interfaces to DisplayPort, STDP3100 facilitates the transition by offering seamless connectivity between new DisplayPort PC and notebooks and the installed base VGA monitors and projectors. STDP3100 is a highly integrated converter featuring a DisplayPort receiver, video DAC, clock form generator, test pattern generator, and sink detection block. In addition, STDP3100 includes EDID and MCCS pass-through features, forming a fully transparent operation between the PC and display. Active power consumption of this device is as low as 400mW, and thus it can be powered by the DisplayPort source when used in dongle application. The device has a built in sink detection feature that determines the active and standby state. The device enters into standby (low power) state whenever the VGA cable is disconnected and returns to normal operation when the cable is connected back.

STDP3100 supports video resolutions from VGA through WUXGA. The input DisplayPort interface consists of two main lanes, AUX channel, and HPD signal that maps directly to a standard DisplayPort connector via two layers PCB. The output interface consists of analog R, G, B video, Hsync, Vsync, and DDC signals. Analog video signal amplitude ranges from 0 to 700mV from a 10 bit video DAC with maximum sampling frequency of 162 MHz. The VGA output signal interface conforms to the VSIS standards with separate Hsync and Vsync control signals. The DDC_SDA and DDC_CLK signals are driven from an I2C master, which controls I2C traffic between the DisplayPort AUX channel and external slave device.

ST offers STDP3100 designers kit with complete reference hardware and firmware.

Figure 1. System diagram

SPI

Flash

SPI

Display

Source

Main Link

AUX CH

HPD_out

3.3V from DP connector

27.000 MHz Crystal

STDP3100

TCLK

XCLK

I2C maste r

Analog R,G,B

and Hsync, Vsync

DDC

2/7

STDP3100 Benefits

2 Benefits

● Production-proven DisplayPort receiver from the DisplayPort leader

● Comprehensive feature set for DisplayPort to VGA dongle and for notebook embedded

application

● Proven interoperability with DisplayPort sources from all major graphics vendors

● Cost savings due to optimized BOM, low power, low EMI, and small form factor

● DisplayPort CTS compliant

3/7

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