MS1827 Multi-Channel 4K Audio/Video Processor
The MacroSilicon MS1827 is a multifunction audio/video processor integrating four independent HD audio/video inputs, four independent HD audio/video outputs, eight video-scaling paths, four OSD engines, 2 Gb DDR SDRAM, and a 32-bit controller. It targets multiview displays, video-wall and stitching systems, matrix switchers, and other multi-channel audio/video products.
Key Capabilities
| Item | Specification |
|---|---|
| Video inputs | 4 independent inputs, up to 4K@60Hz, DVI 1.0 compatible |
| Video outputs | 4 independent outputs, up to 4K@60Hz, DVI 1.0 compatible |
| Content protection | HDCP 2.3 / 1.4 decryption on inputs and encryption on outputs |
| Video processing | Up to 8 independent scalers, 8 overlaid video layers, and 4-channel deinterlacing |
| Frame buffer | Integrated 2 Gb DDR SDRAM, 16-bit bus, 2000 MT/s |
| OSD | 4 independent OSD engines with custom fonts, highlight windows, rotation, and scaling |
| Controller | Integrated 32-bit controller up to 72 MHz; 32 KB system RAM and 256 KB code RAM |
| Package | BGA-371, 20 mm × 20 mm |
Block Diagram
The block diagram shows how the four HD inputs and outputs connect to eight video-processing paths, four Video Mixers, integrated DDR, the controller, and digital-audio interfaces.
Audio/Video Inputs
- Four independent video inputs supporting up to
4K@60Hzand DVI 1.0 compatibility. - HDCP 2.3 and HDCP 1.4 video decryption.
- Extended VESA and CEA-861-F video formats.
- RGB, YUV 4:2:2, and YUV 4:4:4 color spaces, with RGB, YUV709, and YUV601 colorimetry.
- 8-, 10-, 12-, and 16-bit color depth.
- Automatic input-resolution detection, input-characteristic error detection, and scrambling decode.
- SCDC, programmable EDID, automatic HPD control, manual and automatic EQ, and DDC-channel control.
- Audio clock recovery, PCM input-volume control, DSD, DST, and HBR Audio with sampling rates up to 1536 kHz.
- Up to eight-channel I2S and SPDIF audio at sampling rates from 32 to 192 kHz.
Audio/Video Outputs
- Four independent video outputs supporting up to
4K@60Hzand DVI 1.0 compatibility. - HDCP 2.3 and HDCP 1.4 video encryption.
- RGB, YUV 4:2:2, and YUV 4:4:4 color spaces, with RGB, YUV709, and YUV601 colorimetry.
- 8-, 10-, 12-, and 16-bit color depth.
- Scrambling, SCDC, automatic HPD detection, and adjustable pre-emphasis.
- DSD, DST, HBR Audio, and up to eight-channel I2S and SPDIF audio transport.
Video Processing
- Simultaneous deinterlacing of four video inputs, with interlaced-video output support.
- Input-side and output-side color-space conversion.
- Up to eight independent scaling paths, supporting enlargement and downscaling to
1/256. - Brightness, contrast, hue, saturation, and sharpness adjustment.
- Frame-rate conversion, cropping, solid-color keying, and multiple scene-transition effects.
- Horizontal and vertical mirroring, plus 90°, 180°, and 270° rotation.
- Up to eight overlaid video layers with programmable transparency.
OSD
- Four independent OSD engines.
- One OSD window and three highlight windows per engine.
- Mixed 1-bit, 2-bpp, and 4-bpp characters with an independently programmable font library for each engine.
- 64 KB programmable font storage per engine, supporting up to 256
32 × 64, 1-bpp characters. - Maximum character size of
32 × 64(H × V) pixels. - OSD-window scaling and 90°, 180°, and 270° rotation.
- Programmable foreground, background, and highlight colors; color lookup tables; video blending; and fade effects.
Digital Audio and Control Interfaces
- Four configurable input/output I2S ports.
- Four configurable input/output SPDIF ports multiplexed with I2S MCLK pins.
- I2S input-volume adjustment and multi-channel audio mixing.
- Two UARTs, 14 GPIOs, four external interrupts, and three time-multiplexed ADC inputs.
- One four-wire SPI master for loading code from an external SPI Flash.
- One I2C slave, plus support for programming external SPI Flash through a video-input DDC channel.
- Two 32-bit timers, a system tick timer, and a watchdog timer.
Clock, Power, and Package
| Item | Specification |
|---|---|
| External clock | 24 MHz crystal-clock input |
| Power rails | 3.3 V, 2.5 V, 1.5 V, and 1.1 V |
| Unique identifier | Per-device unique code supported |
| Package | Molded BGA-371, 20 mm × 20 mm |
Typical Applications
- Multiview processors and multi-channel video stitching systems
- 4K video matrices and audio/video switchers
- Video-wall controllers and display processors
- Multi-channel systems requiring OSD, scaling, rotation, or frame-rate conversion
- Audio/video processors requiring multi-channel audio mixing and port swapping
Design Notes
- The public product page specifies a maximum capability of
4K@60Hz. Validate practical input/output combinations, color depth, color format, and HDCP mode against system bandwidth and the selected configuration. - Products using HDCP encryption or decryption must comply with applicable licensing and key-management requirements.
- The device uses multiple power rails. PCB design should account for power sequencing, power integrity, integrated-DDR requirements, and high-speed audio/video signal integrity.
- Confirm drivers, firmware, register programming, and reference designs against the latest authorized MacroSilicon documentation.
References
Notes
This page summarizes information published on MacroSilicon's public MS1827 product page. Confirm feature combinations, parameter limits, package dimensions, and production support against the latest authorized datasheet, reference design, and project validation results.