The μPD72850A is the 3-port physical layer LSI which complies with the P1394a draft 2.0 specifications.

The μPD72850A works up to 400 Mbps. It is an upgrade of NECs μPD72850.

FEATURES

? The Three-port Physical Layer LSI complies to IEEE P1394a draft 2.0

? Connection debounce

? Arbitration enhancements

? Arbitrated short bus reset

? Ack-accelerated arbitration

? Fly-by concatenation

? Multiple-speed packet concatenation

? Arbitration enhancements and cycle start (controlled by the Link layer)

? Performance optimization via PHY pinging

? Priority arbitration (controlled by the Link layer)

? Data rate: 393.216 / 196.608 / 98.304 Mbps

? Compliant with Suspend/Resume function as defined in P1394a draft 2.1

? 3.3 V single power supply

? Electrical isolated Link interface

? 24.576 MHz crystal clock generation, 393.216 MHz PLL multiplying frequency

? System power management by signaling of node power class information

? Cable power monitor (CPS) is equipped

? Fully interoperable with IEEE1394 std 1394 Link (FireWireTM, i.LINKTM)

? Cable bias and terminal voltage driver supply function (for 3-port each)

? Separate digital power and analog GND

? Enable/Disable port control switch when power supply is powered on

? Support Suspend/Resume Off mode (Compliant with P1394a draft 1.3)

? Number of supported port are selectable

? 1port, 2port, 3port. This selection is only under Suspend/Resume Off mode

? Compliant with MD8405E (FUJIFILM MICRODEVICES CO., LTD)