4th Generation USB2.0 Flash Media Controller with Integrated Card Power FETs and HS Hub

Datasheet

Revision 1.3 (05-25-05)

20

SMSC USB2601/USB2602

DATASHEET

Notes:

■

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.

6.2

Buffer Type Descriptions

3.3V Analog Power

VDDA33

3.3v Analog PHY Power

DIGITAL POWER, GROUNDS, and NO CONNECTS

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 VDD18

regulator.

Ground

VSS

Ground Reference

No Connect

NC

No Connect. No trace or signal should be

routed/attached to these pins.

Table 6.1 USB2601/USB2602 Buffer Type Descriptions

BUFFER

DESCRIPTION

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.

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

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION