Syba SI-PCI40074 integrates six independent SATA channels, and a micro-processor. With proper setting the chip can be configured as a 1 to 5-ports SATA II Port Multiplier, or a 5 to 1-port SATA II Port Selector. Based on JMB321 single chip. JMB321 contains 15 GPIOs which can be configured as various standard interfaces. It also has the capability to load external firmware code to extend its functionality.

• Compliant with Serial ATA II Port Multiplier Spec. Revision 1.2
  
• Compliant with Serial ATA II Port Selector Spec. Revision 1.0
  
• Compliant with Serial ATA High Speed Serialized AT Attachment Spec. Revision 2.5
  
• Support 6-port 3.0 Gbps SATA II Interface
  
• Supports SATA II Gen2i and Gen2m (External SATA Connection, eSATA)
  
• Automatically Speed Negotiation for 3Gbps or 1.5Gbps
  
• Supports Native Command Queue (NCQ)
  
• Supports Hot-plug
  
• Supports PM Aware and Non-PM Aware Host
  
• Supports Asynchronous Notification
  
• Supports ATAPI drives
  
• Supports Partial / Slumber Power Saving Mode
  
• GPIO
  
  • Supports 15GPIOs
    
  • Supports I2C Interface
    
  • Supports ISA Interface
    
  • Supports SPI Interface
    
  • Supports Firmware Extension