Description

The OS85650 and OS85652 are Input/Output Companion ICs that provide MediaLB® port expansion. They allow a wide variety of I/O types to be conveniently interfaced to a MOST® network. All MOST data types are supported (control, asynchronous, synchronous and isochronous). A powerful routing engine allows simultaneous routing of data between the MediaLB (3-Pin and/or 6-Pin) and the various I/O ports available on the chip including:

• HBI (16-bit parallel port)
• Serial Audio I/O (I2S and sequential (TDM) modes)
• Serial and parallel TSIs
• SPI
• I²C

The high-performance routing engine operates at an internal speed of up to 1.5 Gbits/sec. It is able to simultaneously route a variety of data types between applications hardware located on the PCB or between those applications and the MOST network. For example, a combination of Ethernet data packets, MPEG transport stream packets, and multiple audio channels required for 7.1 surround sound applications can be routed between ports and encrypted/decrypted as necessary.

The I/O Companion can interface with any of SMSC's Intelligent Network Interface Controller (INIC) devices via the MediaLB 3-Pin interface. The additional MediaLB 6-Pin interface enables high-speed communication to the INIC150 which is required for higher bandwidth applications. Together with the 16-bit parallel HBI, it enables a high-speed connection between the INIC150 and multiple EHCs with over 300 Mbits/sec. It is also possible to use the OS8565x as a bridge between MediaLB 6-Pin and MediaLB 3-Pin.

Applications

The I/O Companion serves as a generic I/O port expander for various audio and video applications such as:

• Head units
• Rear Seat Entertainment (RSE)
• Amplifiers
• TV tuners
• DVD drives
• Blu-ray drives
• Video displays

For product comparison, please consider: OS85650, OS85656

• Media Local Bus (MediaLB®) Ports
  • Supports all MOST® data types
  • Eases inter-chip communication and streaming
  • Differential MediaLB 6-pin interface (up to 8192×Fs)
  • Single-ended MediaLB 3-pin interface (up to 1024×Fs)
• Host Bus Interface (HBI)
  • Supports all MOST data types
  • 16-bit parallel slave port (up to 355 Mbps)
  • SRAM-like interface
• Streaming Ports
  • Supports streaming legacy audio formats
  • Supports 7.1 audio (input/output)
• Transport Stream Interface (TSI) Ports
  • Supports MPEG2 TS, 188-byte packets
  • Serial interfaces operation (up to 50 Mbps)
  • Parallel interface available (up to 216 Mbps)
• Serial Peripheral Interface (SPI) Ports
  • Supports asynchronous packet exchange
  • Supports Quality of Service (QoS) packet exchange
• Control Port supports I2C format for control messages and asynchronous packets
• Operating voltages 3.3/1.8 V