SMSC USB2640, USB2640i QFN, NAME, TYPE, 48-PIN, BUFFER, SYMBOL, DESCRIPTION, MEMORY STICK INTERFACE, Table 6.1 USB2640/USB2641 Pin Descriptions (continued)

Ultra Fast USB 2.0 Multi-Format Flash Media Controller/USB Hub Combo

Table 6.1 USB2640/USB2641 Pin Descriptions (continued)

		48-PIN	BUFFER
NAME	SYMBOL	QFN	TYPE	DESCRIPTION
xD Write Enable	xD_nWE	22	O12PU	This pin is an active low write strobe signal for the
				xD device.
				When using the internal FET, this pin has an
				internal weak pull-up resistor that is tied to the
				output of the internal Power FET, and is controlled
				by the xD_PU bit of the xDC_CTL register.
				If an external FET is used (Internal FET is
				disabled), then the internal pull-up is not available
				(external pull-ups must be used).
xD Busy or Data	xD_nB/R	28	IPU	This pin is connected to the BSY/RDY pin of the
Ready				xD device.
				When using the internal FET, this pin has an
				internal weak pull-up resistor that is tied to the
				output of the internal Power FET, and is controlled
				by the xD_PU bit of the xDC_CTL register.
				If an external FET is used (Internal FET is
				disabled), then the internal pull-up is not available
				(external pull-ups must be used).
xD Chip Enable	xD_nCE	26	O12PU	This pin is an active low chip enable signal for the
				xD device.
				When using the internal FET, this pin has an
				internal weak pull-up resistor that is tied to the
				output of the internal Power FET, and is controlled
				by the xD_PU bit of the xDC_CTL register.
				If an external FET is used (Internal FET is
				disabled), then the internal pull-up is not available
				(external pull-ups must be used).
xD Card	GPIO14 /	29	I/O12	GPIO: This general purpose pin may be used
Detection GPIO	xD_nCD			either as input, edge sensitive interrupt input, or
				output.
				xD_nCD: This is a GPIO designated as the xD-
				Picture Card detection pin.
		MEMORY STICK INTERFACE
MS Bus State	MS_BS	21	O12	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, and BS3) of the MS device.
MS Card	GPIO12 /	31	IPU	GPIO: This general purpose pin may be used
Insertion GPIO	MS_INS			either as input, edge sensitive interrupt input, or
				output.
				MS_INS: This is a GPIO designated as the
				Memory Stick card detection Pin.
MS System CLK	MS_SCLK	13	O12	This pin is an output clock signal to the MS device.
				The clock frequency is software configurable.

Revision 2.0 (10-03-08)	18	SMSC USB2640/USB2641
	DATASHEET