AT43311 Datasheet, PDF (1/24 Pages) ATMEL Corporation – USB Hub

AT43311
Features
• Self-Powered Hub with Bus Power Controller
• Full Compliance with USB Spec Rev 1.0
• Full Speed USB Host Interface
• Four Downstream Ports
• Downstream Support for Full Speed and Low Speed Transfer Rates
• Continual Monitoring of Port by System Host
• Individual Port Power Control
• USB Connection Status Indicators
• 6 MHz Oscillator with On-Chip PLL
Description
The AT43311 is a fully compliant USB hub chip with 5 ports, one upstream port and
four full/low-speed downstream ports. The AT43311 can be used as a stand alone or
can provide a simple and quick method of adding USB ports to an existing device.
As a repeater, the AT43311 provides upstream connectivity between the selected
function and the host. Connectivity involves setting up and tearing down connections,
handling bus faults, recovering from bus faults and detecting downstream device con-
nections and disconnections.
The AT43311 may also act as a hub controller managing the hub operations and
recording the status of the hub, bus transactions, and downstream ports. In this mode,
the AT43311 tracks and generates the bus enumeration, provides configuration infor-
mation to the host, provides individual port status to the host, and controls the port
operation based on host commands.
USB Hub
AT43311
Preliminary
Pin Configurations
SOIC/DIP/Cerdip
PWR2 1
PWR3 2
PWR4 3
VCC5 4
VSS 5
OSC1 6
OSC2 7
LFT 8
VCCA 9
OVL4 10
OVL3 11
OVL2 12
OVL1 13
VREF 14
GND 15
STAT4 16
32 PWR1
31 DP4
30 DM4
29 DP3
28 DM3
27 GND
26 DP2
25 DM2
24 VCC3
23 DP1
22 XDM1
21 DP0
20 DM0
19 STAT1
18 STAT2
17 STAT3
0738A-A
1