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AT43311 Datasheet

  • AT43311

  • USB Hub

  • 24頁(yè)

  • ATMEL   ATMEL

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AT43311
Features
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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
PWR3
PWR4
VCC5
VSS
OSC1
OSC2
LFT
VCCA
OVL4
OVL3
OVL2
OVL1
VREF
GND
STAT4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
PWR1
DP4
DM4
DP3
DM3
GND
DP2
DM2
VCC3
DP1
XDM1
DP0
DM0
STAT1
STAT2
STAT3
0738A-A
1

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