SMSC USB2602 Manual De Usuario

4th Generation USB 2.0 Flash Media Controller with Integrated Card Power FETs & HS Hub

Revision 1.6 (06-20-08)

20

SMSC USB2601/USB2602

„

Hot-insertion capable card connectors are required for all flash media. It is required for SD 
connector to have Write Protect switch. This allows the chip to detect MMC card.

„

nMCE is normally asserted except when the 8051 is in standby mode.

3.3V Analog Power

VDDA33

3.3v Analog PHY Power 

1.8V Digital Core 

Power

VDD18

+1.8V Core power

All VDD18 pins must be connected together on the 
circuit board.

3.3v Power & &

Voltage Regulator 

Input

VDD33

3.3V Power & Regulator Input.

Pin 87 supplies 3.3V power to the internal 1.8V 
regulator. 

Ground

VSS

Ground Reference

No Connect

NC

No Connect. No trace or signal should be 
routed/attached to these pins.

I

Input

IPU

Input with internal weak pull-up resistor.

IPD

Input with internal weak pull-down resistor.

IS

Input with Schmitt trigger

I/O8

Input/Output buffer with 8mA sink and 8mA source.

I/O8PU

Input/Output buffer with 8mA sink and 8mA source, with an internal weak pull-up resistor.

I/O8PD

Input/Output buffer with 8mA sink and 8mA source, with an internal weak pull-down 
resistor.

I/O12

Input/Output, 12mA

O8

Output buffer with 8mA sink and 8mA source.

O8PU

Output buffer with 8mA sink and 8mA source, with an internal weak pull-up resistor.

O8PD

Output buffer with 8mA sink and 8mA source, with an internal weak pull-down resistor.

ICLKx

XTAL clock input

OCLKx

XTAL clock output

I/O-U

Analog Input/Output Defined in USB specification

AIO

Analog Input/Output