JMB321-QGCP0B JMB321 JMICRON

JMB321-QGCP0B JMB321 JMICRON 1 to 5-ports Serial ATA II Port Multiplier or a 5 to 1-port Serial ATA II Port Selector

JMicron JMB321 is a single chip. It integrated six independent SATA channels and a
micro-processor. With proper setting, the chip can be configured as an 1 to 5-ports Serial ATA II
Port Multiplier or a 5 to 1-port Serial ATA II Port Selector.
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.

2.1 Compliance
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 II PHY Electrical Spec. Revision 1.0
Compliant with
Serial ATA High Speed Serialized
AT Attachment Spec. Revision 2.5
2.2 General
Integrated 6-port SATA II PHY
Integrated PLL for SATA II interface
Total six independent SATA channel
Integrated uP, PROM and SRAM for firmware programming
Fabricated in 0.13um CMOS Standard Logic Process
1.3V core and 3.3V I/O power supply
Available in 64-pin QFN
2.3 SATA
Supports 6-port 3.0Gbps SATA II interface
Supports SATA II Gen2i and Gen2m (External SATA Connection, eSATA)
Output swing control and automatic impedance calibration for SATA II PHY
Supports asynchronous signal recovery
Supports spread spectrum clocking
Supports partial / slumber power saving mode
Automatically speed negotiation for 3 Gbps or 1.5 Gbps
Supports BIST and loopback mode
Supports staggered spin-up
Supports 48-bit LBA addressing
Supports ATAPI drives
Supports Native Command Queue (NCQ)
Supports Hot-Plug