SMSC USB2250i, USB2251, USB2250, USB2251i User Manual

USB2250/50i/51/51i

Ultra Fast USB 2.0 Multi-Slot

Flash Media Controller

PRODUCT FEATURES	Datasheet

General Description

The SMSC USB2250/50i/51/51i is a USB 2.0 compliant, high speed Mass Storage Class Peripheral Controller intended for reading and writing to more than 24 popular flash media formats from the CompactFlash® (CF), SmartMediaTM (SM), xD Picture CardTM (xD)1, Memory StickTM (MS), Secure Digital (SD), and MultiMediaCardTM (MMC) families.

The SMSC USB2250/50i/51/51i is a fully integrated, single chip solution capable of ultra high performance operation. Average sustained transfer rates exceeding 35MB/s are possible if the media and host can support those rates.

General Features

128-pin VTQFP (14x14mm) lead-free RoHS compliant package

Targeted for applications in which single or "combo" media sockets are used

Supports multiple simultaneous card insertions

Flexible assignment of number of LUNs and how card types are associated with the LUNs

Hardware-controlled data flow architecture for all selfmapped media

Pipelined hardware support for access to non-self- mapped media

Product name with “i” denotes the version that supports the industrial temperature range of -40ºC to 85ºC

Hardware Features

Single Chip Flash Media Controller with non-multiplexed interface for independent card sockets

Flash Media Specification Revision Compliance

—Compact Flash Specification 4.1

–CF UDMA Modes 0-4

–CF PIO Modes 0-6

—Memory Stick Specification 1.43

—Memory Stick Pro Format Specification 1.02

—Memory Stick Pro-HG Duo Format Specification 1.01

–Memory Stick, MS Duo, HS-MS, MS Pro-HG, MS Pro

—xD Picture Card 1.2

—Smart Media Specification 1.3

—Secure Digital 2.0

–HS-SD, HC-SD, TransFlash™ and reduced form factor media

—MultiMediaCard Specification 4.2

–1/4/8 bit MMC

SDIO and MMC Streaming Mode support

Extended configuration options

—xD player mode operation

—Socket switch polarities, etc.

Media Activity LED

GPIO configuration and polarity

—Up to 11 GPIOs (based on configuration) for special function use: LED indicators, button inputs, power control to memory devices, etc. The number of actual GPIO’s depends on the implementation configuration used.

—Four GPIO’s with up to 200 mA drive

—An additional 16 GPIO’s if CF is not used

On Board 24MHz Crystal Driver Circuit

Optional external 24MHz clock input

4 Independent Internal Card Power FET

—200mA each

—"Fold-back" short circuit current protected

8051 8-bit microprocessor

—60MHz - single cycle execution

—64KB ROM; 14KB RAM

Internal Regulator for 1.8V core operation

Optimized pinout improves signal routing, easing implementation and allowing for improved signal integrity

OEM Selectable Features

VID/PID/Language ID

28-character Manufacturer ID and Product string

12-hex digit (max) Serial Number string

Customizable Vendor specific data by optional use of external serial EEPROM

Busor Self-powered selection

LED blink interval or duration

Internal power FET configuration

Software Features

Optimized for low latency interrupt handling

Reduced memory footprint

Device Firmware Upgrade (DFU) support of external EEPROM or External Flash

—Assembly line support

—End user field upgrade support

—DFU Package consists of driver, firmware, sample DFU application and source code, DFU driver API

Optional custom firmware with external ROM (up to 128k)

Please see the USB2250/50i/51/51i Software Release Notes for additional Software Features.

Applications

Flash Media Card Reader/Writer

Printers

Desktop and Mobile PCs

Consumer A/V

Media Players/Viewers

Vista ReadyBoostTM

1.) xD Picture Card not applicable to USB2251.

SMSC USB2250/50i/51/51i

DATASHEET

Revision 1.1 (05-29-08)

Ultra Fast USB 2.0 Multi-Slot Flash Media Controller

Datasheet

ORDER NUMBER:

USB2250/50i/51/51i-NU-XX for 128-pin, VTQFP Lead-Free RoHS Compliant Package

“XX” in the order number indicates the internal ROM firmware revision level. Please contact your SMSC sales representative for more information.

Table 0.1 USB2250/50i/51/51iComparison of Features

	CompactFlash®
Part Number	Memory StickTM
	Secure Digital		Operational
	MultiMediaCardTM	xD Picture
	SmartMediaTM	CardTM	temperature

USB2250	.	.	0ºC to 70ºC
USB2250i	.	.	-40ºC to 85ºC
USB2251	.		0ºC to 70ºC
USB2251i	.		-40ºC to 85ºC

80 ARKAY DRIVE, HAUPPAUGE, NY 11788 [phone], FAX [phone]

Copyright © 2008 SMSC or its subsidiaries. All rights reserved.

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.

SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT; TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

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Table of Contents

Chapter 1	Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
Chapter 2	Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7

Chapter 3 Pin Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1 128-Pin Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Chapter 4 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Chapter 5 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.1 USB2250/50i/51/51i 128-Pin VTQFP Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.2 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Chapter 6 Pin Reset State Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6.1 128-Pin Reset States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Chapter 7 DC Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.1 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.2 Recommended Operating Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.3 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.4 Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Chapter 8 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

8.1 Oscillator/Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Chapter 9 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Chapter 10 GPIO Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

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List of Figures

Figure 2.1 USB2250/50i/51/51i Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 4.1 USB2250/50i/51/51i 128-Pin VTQFP Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 6.1 Pin Reset States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 6.2 Legend for Pin Reset States Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 6.3 USB2250/50i/51/51i Pin Reset States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 7.1 Supply Rise Time Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Figure 8.1 Typical Crystal Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 8.2 Formula to Find Value of C1 and C2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 9.1 USB2250/50i/51/51i 128-Pin VTQFP, 14x14x1.0mm Body, 2.0mm Pitch . . . . . . . . . . . . . . . 34

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List of Tables

Table 0.1 USB2250/50i/51/51iComparison of Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Table 3.1 USB2250/50i/51/51i 128-Pin VTQFP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 5.2 USB2250/50i/51/51i Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 7.1 Pin Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Table 10.1 USB2250/50i/51/51i GPIO Usage (ROM Rev 0x00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

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Chapter 1 Acronyms

CF: Compact Flash

CFC: Compact Flash Controller

EEPROM: Electrically Erasable Programmable Read-Only Memory

FET: Field Effect Transistor

LUN: Logical Unit Number

MMC: MultiMediaCard

MS: Memory Stick

MSC: Memory Stick Controller

PLL: Phase-Locked Loop

RoHS: Restriction of Hazardous Substances Directive

SD: Secure Digital

SDIO: Secure Digital Input/Output

SDC: Secure Digital Controllerl

SIE: Serial Interface Engine

SM: SmartMedia

SMC: SmartMedia Controller

VTQFP: Very Thin Quad Flat Package

xD: xD Picture Card

*Note: In order to develop, make, use, or sell readers and/or other products using or incorporating any of the SMSC devices made the subject of this document or to use related SMSC software programs, technical information and licenses under patent and other intellectual property rights from or through various persons or entities, including without limitation media standard companies, forums, and associations, and other patent holders may be required. These media standard companies, forums, and associations include without limitation the following: Sony Corporation (Memory Stick, Memory Stick Pro); SD3 LLC (Secure Digital); MultiMedia Card Association (MultiMediaCard); the SSFDC Forum (SmartMedia); the Compact Flash Association (Compact Flash); and Fuji Photo Film Co., Ltd., Olympus Optical Co., Ltd., and Toshiba Corporation (xD-Picture Card). SMSC does not make such licenses or technical information available; does not promise or represent that any such licenses or technical information will actually be obtainable from or through the various persons or entities (including the media standard companies, forums, and associations), or with respect to the terms under which they may be made available; and is not responsible for the accuracy or sufficiency of, or otherwise with respect to, any such technical information.

SMSC's obligations (if any) under the Terms of Sale Agreement, or any other agreement with any customer, or otherwise, with respect to infringement, including without limitation any obligations to defend or settle claims, to reimburse for costs, or to pay damages, shall not apply to any of the devices made the subject of this document or any software programs related to any of such devices, or to any combinations involving any of them, with respect to infringement or claimed infringement of any existing or future patents related to solid state disk or other flash memory technology or applications ("Solid State Disk Patents"). By making any purchase of any of the devices made the subject of this document, the customer represents, warrants, and agrees that it has obtained all necessary licenses under then-existing Solid State Disk Patents for the manufacture, use and sale of solid state disk and other flash memory products and that the customer will timely obtain at no cost or expense to SMSC all necessary licenses under Solid State Disk Patents; that the manufacture and testing by or for SMSC of the units of any of the devices made the subject of this document which may be sold to the customer, and any sale by SMSC of such units to the customer, are valid exercises of the customer's rights and licenses under such Solid State Disk Patents; that SMSC shall have no obligation for royalties or otherwise under any Solid State Disk Patents by reason of any such manufacture, use, or sale of such units; and that SMSC shall have no obligation for any costs or expenses related to the customer's obtaining or having obtained rights or licenses under any Solid State Disk Patents.

SMSC MAKES NO WARRANTIES, EXPRESS, IMPLIED, OR STATUTORY, IN REGARD TO INFRINGEMENT OR OTHER VIOLATION OF INTELLECTUAL PROPERTY RIGHTS. SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES AGAINST INFRINGEMENT AND THE LIKE.

No license is granted by SMSC expressly, by implication, by estoppel or otherwise, under any patent, trademark, copyright, mask work right, trade secret, or other intellectual property right.

**To obtain this software program the appropriate SMSC Software License Agreement must be executed and in effect. Forms of these Software License Agreements may be obtained by contacting SMSC.

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Chapter 2 Block Diagram

						SD/
				AUTO_		MMC
				CBW
				PROC
						CF/
USB					FMI	GPIO (16)
Host		SIE	BUS	BUS
	PHY				FMDU
		CTL	INTFC	INTFC	CTL
						MS
						SM
					EP0 TX
					EP0 RX
				BUS	RAM	4K
				INTFC
						total
	Reg				EP1 RX
					EP1 TX
	1.8V				EP2 RX
					EP2 TX
	PLL		XDATA BRIDGE
			+ BUS ARBITER
						PWR_FET0
						PWR_FET1
						PWR_FET2
						PWR_FET3
						GPIOs
		RAM
		10KB	ADDR
				Program Memory I/O Bus
			MAP
		ROM
		64KB*
	Clock
	Generation and
	Control
			8051		SFR
			PROCESSOR		RAM
		*ROM is not available in USB2259

GPIO8/CARD_PWR0

GPIO9/CARD_PWR1

GPIO10/CARD_PWR2

GPIO11/CARD_PWR3

11 pins

Figure 2.1 USB2250/50i/51/51i Block Diagram

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Chapter 3 Pin Table

3.1128-Pin Package

Table 3.1 USB2250/50i/51/51i 128-Pin VTQFP Package

COMPACTFLASH INTERFACE (28 PINS)

CF_D0/GPIO16	CF_D1/GPIO17	CF_D2/GPIO18	CF_D3/GPIO19
CF_D4/GPIO20	CF_D5/GPIO21	CF_D6/GPIO22	CF_D7/GPIO23
CF_D8/GPIO24	CF_D9/GPIO25	CF_D10/GPIO26	CF_D11/GPIO27
CF_D12/GPIO28	CF_D13/GPIO29	CF_D14/GPIO30	CF_D15/GPIO31
CF_nIOR	CF_nIOW	CF_IRQ	CF_nRESET
CF_IORDY	CF_nCS0	CF_DMACK/TXD/GPIO7	CF_SA0
CF_SA1	CF_SA2	GPIO13 (CF_nCD)	CF_DMARQ/RXD/GPIO2
	SMARTMEDIA INTERFACE (17 PINS)
SM_D0	SM_D1	SM_D2	SM_D3
SM_D4	SM_D5	SM_D6	SM_D7
SM_ALE	SM_CLE	SM_nRE	SM_nWE
SM_nWP	SM_nB/R	SM_nCE	GPIO14 (SM_nCD)
SM_nWPS
	MEMORY STICK INTERFACE (11 PINS)
MS_BS	MS_D0/MS_SDIO	MS_SCLK	GPIO12 (MS_INS)
MS_D1	MS_D2	MS_D3	MS_D4
MS_D5	MS_D6	MS_D7
	SD/MMC INTERFACE (12 PINS)
SD_CMD	SD_CLK	SD_D0	SD_D1
SD_D2	SD_D3	GPIO6 (SD_WP)	GPIO15 (SD_nCD)
SD_D4	SD_D5	SD_D6	SD_D7
	USB INTERFACE (8 PINS)
USB+	USB-	RBIAS	VDD18PLL
VDDA33	XTAL2	XTAL1 (CLKIN)	REG_EN

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Table 3.1 USB2250/50i/51/51i 128-Pin VTQFP Package (continued)

MEMORY/IO INTERFACE (28 PINS)

MA0/CLK_SEL0	MA1/CLK_SEL1	MA2	MA3
MA4	MA5	MA6	MA7
MA8	MA9	MA10	MA11
MA12	MA13	MA14	MA15
MA16	MD0	MD1	MD2
MD3	MD4	MD5	MD6
MD7	nMRD	nMWR	nMCE
	MISC (10 PINS)
nRESET	GPIO3 (VBUS_DET)	GPIO4 (SCL/xD_ID)	GPIO5 (SDA)
LED1 / GPIO1	GPIO8/CARD_PWR0	GPIO9/CARD_PWR1	GPIO10/CARD_PWR2
GPIO11/CARD_PWR3	TEST
	DIGITAL, POWER (14 PINS)
(5) VDD33	(1) VDD18	(8) VSS
	TOTAL 128

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Chapter 4 Pin Configuration

MS_D6 GPIO12 (MS_INS)

MS_D3

MS_D7 MS_SCLK VSS TEST VDD33

GPIO6 (SD_WP) MA7 MA13 MA6 MA8 MA5 MA9 MA4 MA11 MA3 nMRD MA2

CF_DMARQ / RXD / GPIO2 GPIO4 (SCL/xD_ID)

CF_DMACK / TXD / GPIO7 LED1 / GPIO1 GPIO3 (VBUS_DET) VSS XTAL2

XTAL1 (CLKIN) VDD18PLL VSS RBIAS VDDA33

	MS D2		MS D4	MS D0 / MS SDIO	MS D5	MS D1	MS BS	CF D10 / GPIO26	CF D9 / GPIO25	CF D2 / GPIO18	CF D8 / GPIO24	CF D1 / GPIO17	CF D0 / GPIO16	CF SA0	CF SA1	CF SA2	VSS CF IORDY		CF nRESET	GPIO9 / CRD PWR1	VDD33 GPIO10 / CRD PWR2		VSS CF IRQ		CF nIOW	CF nIOR	CF nCS0	CF D15 / GPIO31	CF D7 / GPIO23	CF D14 / GPIO30	CF D6 / GPIO22	CF D13 / GPIO29	VDD33
		96	95	94	93	92	91	90	89	88	87	86	85	84	83	82	81	80	79	78	77	76	75	74	73	72	71	70	69	68	67	66	65
97																																			64
98																																			63
99																																			62
100																																			61
101																																			60
102																																			59
103																																			58
104																																			57
105																																			56
106													SMSC																						55
109																																			52
107																																			54
108																																			53
110											USB225X																								51
113																																			48
111																																			50
112																																			49
									128 VTQFP
114																																			47
117																																			44
115																																			46
116																																			45
															(Top View)
118																																			43
119																																			42
120																																			41
121																																			40
122																																			39
123																																			38
124																																			37
125																																			36
126																																			35
127																																			34
128																																			33
		1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32

nRESET

CF_D5 / GPIO21 CF_D12 / GPIO28 CF_D4 / GPIO20 CF_D11 / GPIO27 CF_D3 / GPIO19 GPIO13 (CF_nCD) GPIO14 (SM_nCD) SM_nB/R SM_nRE

SM_nCE SM_CLE SM_ALE VSS VDD33 VDD18 SM_nWE SM_nWP SM_D0 SM_D1 SM_D2 SM_D3 SM_D4 SM_D5 SM_D6 SM_D7 SM_nWPS MD0

MD1

MD2

MD3

MD7

MA12 MA15 nMWR MA14 GPIO5 (SDA) REG_EN USB+ USBVSS SD_D1 SD_D6 SD_D0 SD_D7 GPIO8 / CRD_PWR0 VDD33 GPIO11 / CRD_PWR3 VSS SD_CLK SD_D5 SD_CMD SD_D4 SD_D3 SD_D2 MA10 MA1 / CLK_SEL1 nMCE MA0 / CLK_SEL0 MA16 MD6 MD5 MD4 GPIO15 (SD_nCD)

Figure 4.1 USB2250/50i/51/51i 128-Pin VTQFP Diagram

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Chapter 5 Pin Descriptions

This section provides a detailed description of each signal. The signals are arranged in functional groups according to their associated interface.

The “n” symbol in the signal name indicates that the active, or asserted, state occurs when the signal is at a low voltage level. When “n” is not present before the signal name, the signal is asserted at the high voltage level.

The terms assertion and negation are used exclusively. This is done to avoid confusion when working with a mixture of “active low” and “active high” signals. The term assert, or assertion, indicates that a signal is active, independent of whether that level is represented by a high or low voltage. The term negate, or negation, indicates that a signal is inactive.

5.1USB2250/50i/51/51i 128-Pin VTQFP Pin Descriptions

Table 5.1 USB2250/50i/51/51i 128-Pin VTQFP Pin Descriptions

		128-PIN	BUFFER
NAME	SYMBOL	VTQFP	TYPE	DESCRIPTION
		COMPACT FLASH INTERFACE
CF Chip Select 0	CF_nCS0	71	O12	This pin is the active low chip select 0 signal
				for the task file registers of the CF ATA
				device in True IDE mode.
CF Register	CF_SA[2:0]	82	I/O12	These pins are the register select address
Address		83		bits for the CF ATA device.
		84
CF Interrupt	CF_IRQ	74	IPD	This is the active high interrupt request
				signal from the CF device.
				This pin has an internal weak pull-down
				resistor that can be controlled by:
				CF_INTF_EN bit of CFC_ATA_MODE_CTL.
CF Data 15-8 /	CF_D[15:8] /	70	I/O12PD	CF_D[15:8]: The bi-directional data signals
GPIO	GPIO[31:24]	68		CF_D15 - CF_D8 in True IDE mode data
		66		transfer
		62		In True IDE Mode, all task file register
		60
				operations occur on the CF_D[7:0], while
		90
				data transfer occurs on CF_D[15:0].
		89
		87		The bi-directional data signal has an internal
				weak pull-down resistor.
			I/O12	GPIO[31:24]: These pins are GPIOs if the
				CF_INTF_EN bit of the CFC_ATA_MODE
				CTL is disabled and the EXTENDED_GPIO
				bit is set in UTIL_CONFIG1 is enabled.

SMSC USB2250/50i/51/51i

11

Revision 1.1 (05-29-08)

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