USB2502-HT SMSC, USB2502-HT Datasheet - Page 36

• Manufacturer Part Number: USB2502-HT
• Description: CONTROLLER, HUB, USB2.0, 2PORT, 36QFN
• Manufacturer: SMSC

Specifications of USB2502-HT

• Supply Voltage Range: 1.62V To 1.98V, 3V To 3.6V
• Digital Ic Case Style: TQFP
• No. Of Pins: 48
• Operating Temperature Range: 0°C To +70°C
• Supply Voltage Max: 3.6V
• Supply: RoHS Compliant
• Package / Case: TQFP
• Data Rate Max: 480Mbps
• Rohs Compliant: Yes

2-Port USB 2.0 Hub Controller
Datasheet
5.6.2
USB Bus Reset
In response to the upstream port signaling a reset to the Hub, the Hub does the following:
Note: The Hub does not propagate the upstream USB reset to downstream devices.
1. Sets default address to 0.
2. Sets configuration to: Unconfigured.
3. Negates PRTPWR to all downstream ports.
4. Clears all TT buffers.
5. Moves device from suspended to active (if suspended).
6. Complies with Section 11.10 of the USB 2.0 Specification for behavior after completion of the reset
sequence.
The Host then configures the Hub and the Hub’s downstream port devices in accordance with the USB
Specification.
Revision 2.3 (08-27-07)
36
SMSC USB2502
DATASHEET