ST STDP4028 User Manual

STDP4028
DisplayPort transmitter
Data brief
Features
– DP 1.1a compliant – Embedded DisplayPort (eDP) compliant – 1, 2, or 4 lanes
Higher bandwidth “Turbo mode” (3.24 Gbps)
per lane, supports: – 1920 x 1080 (FHD) 120 Hz/10-bit color
video standard timings and 7.1 Ch audio
– 2560 x 1600 (WQXGA), 2560 x 2048
(QSXGA) 60 Hz/10-bit color graphics and
7.1 Ch audio
Interface compatibility with wide range of
display controller ICs – LVTTL (60 wide) and LVDS (quad bus)
video interface
– 8-Ch I2S and SPDIF audio interface
Robust AUX channel
– Link service, maintenance – I2C-over-AUX (MCCS, DDC) – IR, full duplex UART protocol
Configurable through I2C host interface
Supports HDCP 1.3 with on-chip keys
HDCP repeater capability
– Acts as downstream transmitter
Spread spectrum on DisplayPort, LVDS, and
TTL interfaces for EMI reduction
Supports deep color and color format
conversion – RGB/YCC (4:4:4) – 10-bit color – YCC (4:2:2/4:2:0) – 12-bit color – RGB (4:4:4) to YCC (4:4:4) conversion and
vice-versa
Low power operation; 20 mW standby
I2C to AUX bridge for EDID, MCCS pass
through
Supports HBR/“Turbo” speed over HBR/RBR-
rated long cables (15 m and more)
Package
– 164 LFBGA (12 x 12 mm / 0.8 mm)
Power supply voltages
– 3.3 V I/O; 1.2 V core
Applications
Digital TV, docking station, STB, game
console, etc.
QLVDS/ TTL (60) Video
I2S/SPDIF Audio
LVDS/TTL
I2S/SPDIF
I2C Host Interface
Receiver
Receiver
Oscillator
Crystal
DisplayPort Transmitter
GPIO
DP Output
I2C
Master
September 2010 Doc ID 15886 Rev 1 1/7
For further information contact your local STMicroelectronics sales office.
www.st.com
7
Description STDP4028

1 Description

The STDP4028 is a DisplayPort transmitter IC for the secure transmission of high­bandwidth, uncompressed digital audio-video signals targeted for applications such as DTV, LCD monitor, docking station, and other types of display systems. STDP4028 is a VESA DP
1.1a and eDP compliant device, implementing a single link DisplayPort output port comprising four main lanes, auxiliary channel and HPD. In addition to the standard HBR (2.7 Gbps) and RBR (1.62 Gbps) speeds, this device supports “turbo” speed of 3.24 Gbps per lane with a total link bandwidth of 12.96 Gbps. The higher bandwidth provides unique benefits to users over other commercial DP transmitters for embedded applications by offering additional margin to support higher color depth, resolution, and refresh rate. For example, STDP4028 supports FHD non-reduced blanking video (1080p 30-bit color per pixel) at 120 Hz, plus 7.1 Ch audio in two-box TV applications. The high-speed auxiliary channel in STDP4028 acts as a bidirectional communication link, supporting application­specific protocols such as MCCS, DDC, UART, IR, as well as, the dedicated DisplayPort link training and device management functions.
The STDP4028 supports RGB and YCC video color formats with color depth of 12 (YCC 4:2:2 only), 10, and 8 bits. This device offers LVDS and LVTTL input interface configurable to map a wide range of display controller products. The Quad LVDS interface supports video signals up to 400 MHz pixel rate with flexible channel and lane swapping options. The 60-bit LVTTL input ports on STDP4028 can be mapped to transfer video data either in two pixels per clock or single pixel per clock of a chosen color depth. The STDP4028 also supports both compressed and uncompressed audio formats. This device comprises four I2S audio inputs, supporting up to 8 channels LPCM audio and a single wire SPDIF input for encoded audio. The STDP4028 features HDCP 1.3 content protection scheme with an embedded key option for secure transmission of digital audio-video content. In addition, it supports the HDCP repeater function and, thus acts as a downstream transmitter suitable for two-box TV and HDMI/DVI to DP converter applications.
The STDP4028 can be configured by an external host through the I2C host interface. This IC also includes general purpose inputs/outputs that can be used for controlling system components. The STDP4028 features a color space converter (RGB to YCC and YCC to RGB) for flexible interface with external video processing devices.

Figure 1. System diagram

LVDSx4
TTL (60 bits)
Video/Audio
Processor
2/7 Doc ID 15886 Rev 1
I2S (8 CH)/
SPDIF
STDP4028
STDP4028
I2C for Host
Interface and
I2C-over-AUX
DisplayPort
27 MHz
crystal
STDP4028 Benefits

2 Benefits

ST DP transmitter offers proven interoperability with commercial DP monitors
20% higher link bandwidth compared to other commercial DP transmitters, supports
FHD 120 Hz/10-bit non-reduced blank timing for embedded applications
Supports both external (DP) and embedded (eDP) applications
HDCP repeater capability, applicable for two-box TV and HDMI/DVI to DP converters
Embedded HDCP keys
On-chip microprocessor enables stand-alone operation for customized applications
Flexible interface to ease system design – DP 1, 2, 4 lane configuration, LVDS/LVTTL
port, YCC/RGB color format
Low EMI
Low power
Doc ID 15886 Rev 1 3/7
Feature attributes STDP4028

3 Feature attributes

Video
Up to 2560 x 2048-60 Hz, 2560 x 1600-60 Hz, FHD 120 Hz at 10-bits per color
8/10/12 bits per color option
RGB/YCC color format
Audio
8-Ch I2S; word length up to 64 x Fs; bit depth up to 32 bits, sample rate up to 192
kHz
SPDIF; 2-Ch LPCM, AC3, DTS, bit depth up to 24 bits, sample rate up to 192 kHz
Input interface
Video: TTL 60/48 bits wide; QLVDS 8/10 per color
Audio: I2S 8-Ch, SPDIF x1
Output interface
DP 1.1a (4 lanes, AUX, HPD); supported link speed 3.24 Gbps, 2.7 Gbps, 1.62
Gbps
Spread spectrum
Supported on DP output and LVDS/TTL inputs
AUX capabilities
UART, I2C-over-AUX (MCCS, DDC, etc.) IR
HDCP
On-chip keys, HDCP repeater
Color format conversion
RGB 4:4:4 to YCC 4:4:4 and vice-versa
System configuration
I2C host interface for control by an external system microprocessor
Package
164 LFBGA (12 x 12 mm), 1 mm thickness, 0.8 pitch
Power
Sub 900 mW max, 20 mW standby
ESD
2 KV HBM, 200 V MM, 750 V CDM
4/7 Doc ID 15886 Rev 1
STDP4028 Ordering information

4 Ordering information

b

Table 1. Order codes

Part number Description
STDP4028 164 LFBGA (12 x 12 mm)
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com ECOPACK® is an ST trademark.
.
Doc ID 15886 Rev 1 5/7
Revision history STDP4028

5 Revision history

Table 2. Document revision history

Date Revision Changes
15-Sep-2010 1 Initial release.
6/7 Doc ID 15886 Rev 1
STDP4028
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Doc ID 15886 Rev 1 7/7
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