HP Visualize c360 PA-RISC Visualize Workstation Universal Serial Bus - Page 12

Comparing USB to Legacy Attribute Ports per host Pin count Cable segment length Max. transparent distance Topology Device-to-Device I/O? Hot attach/detach Device power Power available Power management Devices/port controller Device enumeration Peak transfer rate Error control Flow control USB Open (2 typ.) 4 5m 30m PS/2 2 6 (4 used) ~4m ~4m Tiered Star No Yes Bus or Local Point-to-Point N/A No Host or Local 100-500mA / port 1 A / port Yes No 127 2 + eavesdrops All Keyboard and Mouse only 12 Mbps ~12.5 Kbps CRC Packet re-try None Clocked I/O HP-HIL 1 4 3m ~45m Daisy-Chain No No Host only 1 A / system No 7 Yes 60 Kbps None Clocked I/O Serial Open (2 typ.) 3...25 (9 typ.) 50 ft., however Unlimited w/repeaters Point-to-Point No No Local or Parasitic Pull-up Trickle No 1 + eavesdrops Rarely ~115 Kbps Per device Unreliable Parallel 1...3 (1 Typ.) 34 3m Unlimited w/repeaters Point-to-Point No No Local or Parasitic Pull-up Trickle No 1 + eavesdrops Sometimes ~3 MB/s (typ. < 1 MB) None Handshake