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

Datasheet

Revision 1.3 (02-13-06)

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