USB2229 datasheet(13/28 Pages) MICROCHIP

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 2005-2016 Microchip Technology Inc.

DS00002252A-page 13

USB2229/USB2230

Card Detection

SM_nCD

IPU

This is the card detection signal from SM device to

indicate if the device is inserted.

This pin has an internally controlled weak pull-up resistor.

MEMORY STICK INTERFACE

Bus State

MS_BS

This pin is connected to the BS pin of the MS device.

It is used to control the Bus States 0, 1, 2 and 3 (BS0,

BS1, BS2 and BS3) of the MS device.

System

Data In/Out

MS_SDIO/MS_D

I/O8PD

This pin is a bi-directional data signal for the MS device.

Most significant bit (MSB) of each byte is transmitted first

by either MSC or MS device.

The bi-directional data signal has an internal weak pull-

down resistor.

System

Data In/Out

MS_D[3:1]

I/O8PD

This pin is a bi-directional data signal for the MS device.

The bi-directional data signals have internal weak pull-

down resistors.

Card Insertion

MS_INS

IPU

This pin is the card detection signal from the MS device

to indicate, if the device is inserted.

This pin has an internally controlled weak pull-up resistor.

System CLK

MS_SCLK

This pin is an output clock signal to the MS device.

The clock frequency is software configurable.

SD INTERFACE

Data3-0

SD_DAT[3:0]

I/O8PU

These are bi-directional data signals.

These pins have internally controlled weak pull-up

resistors.

SD Clock

SD_CLK

This is an output clock signal to SD/MMC device.

The clock frequency is software configurable.

SD Command

SD_CMD

I/O8PU

This is a bi-directional signal that connects to the CMD

signal of SD/MMC device.

This pin has an internally controlled weak pull-up resistor.

Write Protected

SD_nWP

IPD

This pin is an input signal with an internal weak pull-

down.

This pin has an internally controlled weak pull-down

resistor.

USB INTERFACE

USB Bus Data

USBDM

USBDP

IO-U

These pins connect to the USB bus data signals.

USB Transceiver Bias

RBIAS

A 12.0k

,  1.0% resistor is attached from VSSA to this

pin, in order to set the transceiver’s internal bias currents.

Analog Test

ATEST

AIO

This signal is used for testing the analog section of the

chip and should be connected to VDDA33 for normal

operation.

1.8v PLL Power

VDD18PLL

1.8v Power for the PLL

PLL Ground

Reference

VSSPLL

Ground Reference for 1.8v PLL power

3.3v Analog Power

VDDA33

3.3v Analog Power

Analog Ground

Reference

VSSA

Analog Ground Reference for 3.3v Analog Power.

TABLE 5-1:

USB2229/USB2230 PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Buffer Type

Description

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