5th Generation Hi-Speed USB Flash Media & IrDA Controller with Integrated Card Power FETs

Datasheet

Revision 1.2 (02-21-05)

20

SMSC USB2229/USB2230

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

IrDA

IR MODE

IR_MODE

O8

IR_MODE, declares the operating speed of the IR link.

IR Receive Data or

UART RX

IR_RXD/RX

I

IR_RXD, can be used as IR receiver or as the UART

RX line.

IR Transmit Data or

UART TX

IR_TXD/TX

O8

IR_TXD, can be used as IR transmitter or as the UART

TX line.

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.

Pins 100 & 108 supply 3.3V power to the internal 1.8V

regulators.

Ground

VSS

Ground Reference

Table 6.2 USB2229/USB2230 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

Table 6.1 USB2229/USB2230 Pin Descriptions

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION