2010 - 2015 Microchip Technology Inc.
DS00001979A-page 1
Highlights
The Microchip USB224x is a USB 2.0 compliant, Hi-
Speed bulk only
1
mass storage class peripheral con-
troller intended for reading and writing to popular flash
media from the xD-Picture Card
TM
(xD)
2
, Memory
Stick
®
(MS), Secure Digital (SD), and MultiMedia-
Card
TM
(MMC) families.
The USB224x is a fully integrated, single chip solution
capable of ultra high performance operation. Average
sustained transfer rates exceeding 35 MB/s are possi-
ble if the media and host can support those rates. The
USB2244/44i includes provisions to read/write secure
media formats.
General Features
• Low pin count 36-pin QFN (6x6 mm) RoHS com-
pliant package
• USB2240/40I/41/41I
- Targeted for applications in which single or
"combo" media sockets are used
• Hardware-controlled data flow architecture for all
self-mapped media
• Pipelined hardware support for access to non-
self-mapped media
• Order number with “I” denote the products that
support the industrial temperature range of -40ºC
to 85ºC
• Support included for secure media format on a
licensed, customized basis
- USB2244/44I: SD Secure
Hardware Features
• Single chip flash media controller with
- USB2240/40I/41/4I: multiplexed interface for
use with “combo” card sockets
- USB2244/44I: SD/MMC flash media reader/
writer
• MMC Streaming Mode support
• Extended configuration options
- xD player mode operation
- Socket switch polarities, etc.
• Media Activity LED
• On board 24 MHz crystal driver circuit
• Optional external 24 MHz clock input
3
• Internal card power FET
- 200 mA
- "Fold-back" short circuit protection
• 8051 8-bit microprocessor
- 60 MHz - single cycle execution
- 64 KB ROM | 14 KB RAM
• Supports a single external 3.3 V supply source;
internal regulators provide 1.8 V internal core volt-
age for additional bill of materials and power sav-
ings
• Optimized pinout improves signal routing which
eases implementation for improved signal integ-
rity
Flash Media Specification Compliance
• Secure Digital 2.0
- HS-SD, SDHC
- TransFlash
TM
and reduced form factor media
• MultiMediaCard 4.2
- 1/4/8-bit MMC
• Memory Stick Formats
- MS 1.43, Pro 1.02, Duo 1.10
- Pro-HG Duo 1.01
–MS, MS Duo, HS-MS, MS Pro-HG, MS Pro
• xD-Picture Card 1.2
Software Features
• Customizable vendor specific data
• Optimized for low latency interrupt handling
• Reduced memory footprint
Applications
• Flash media card reader/writers
• Desktop and mobile PCs
• Printers
• Consumer A/V and media players/viewers
• Compatible with
–Microsoft
®
Vista
TM
and Vista ReadyBoost
TM
–Windows
®
XP, ME, 2K SP4
–Apple Mac OSx
®
–Linux Mass Storage Class Drivers
1.Bulk only is not applicable to USB2240/40i/41/41i.
2.xD-Picture Card is not applicable to USB2241/41i.
3.Only applicable to USB2240/40i/41/41i.
USB224X
Ultra Fast USB 2.0 Multi-Format, SD/MMC, and MS Flash
Media Controllers
USB224X
DS00001979A-page 2
2010 - 2015 Microchip Technology Inc.
TO OUR VALUED CUSTOMERS
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products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and
enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
E-mail at
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. We welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for cur-
rent devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the
revision of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site;
http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include -literature number) you are
using.
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Register on our web site at
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to receive the most current information on all of our products.
2010 - 2015 Microchip Technology Inc.
DS00001979A-page 3
USB224X
1.0
INTRODUCTION
The Microchip USB224x is a flash media card reader solution fully compliant with the USB 2.0 specification. All required
resistors on the USB ports are integrated into the device. This includes all series termination resistors on D+ and D–
pins and all required pull-down and pull-up resistors. The over-current sense inputs for the downstream facing ports
have internal pull-up resistors.
1.1
Hardware Features
• Single chip flash media controller in low pin count 36-pin QFN, RoHS compliant package
• Commercial temperature products support 0°C to +70°C: USB2240/41 and USB2244
• Industrial temperature products support -40°C to +85°C: USB2240I/41I and USB2244I
• 8051 8-bit microprocessor
- 60 MHz - single cycle execution
- 64 KB ROM |14 KB RAM
• Supports a single external 3.3 V supply source; internal regulators provide 1.8 V internal core voltage for addi-
tional bill of materials and power savings
Compliance with the following flash media card specifications:
• Secure Digital 2.0
- HS-SD and SDHC
- TransFlash™ and reduced form factor media
• MultiMediaCard 4.2
- 1/4/8 bit MMC
• Memory Stick 1.43
• Memory Stick Pro Format 1.02
• Memory Stick Pro-HG Duo Format 1.01
- Memory Stick, MS Duo, HS-MS, MS Pro-HG, MS Pro
• Memory Stick Duo 1.10
• xD-Picture Card 1.2
1.2
Software Features
• If the OEM is using an external EEPROM, the following features are available:
- Customizable vendor, product, language, and device ID’s
- 12-hex digits maximum for the serial number string
- 28-character manufacturer ID and product strings for the flash media reader/writer
- LED blink interval or duration
USB224X
DS00001979A-page 4
2010 - 2015 Microchip Technology Inc.
2.0
ACRONYMS
ATA:
Advanced Technology Attachment
FET:
Field Effect Transistor
LUN:
Logical Unit Number
MMC: MultiMediaCard
MSC:
Memory Stick Controller
1
PLL: Phase-Locked
Loop
QFN:
Quad Flat No leads
RoHS:
Restriction of Hazardous Substances Directive
RXD:
Received eXchange Data
SDC:
Secure Digital Controller
SIE:
Serial Interface Engine
TXD:
Transmit eXchange Data
UART:
Universal Asynchronous Receiver-Transmitter
UCHAR:
Unsigned Character
UINT:
Unsigned Integer
1.Not applicable to USB2244/44i.
2010 - 2015 Microchip Technology Inc.
DS00001979A-page 5
USB224X
3.0
BLOCK DIAGRAMS
FIGURE 3-1:
USB2240/40I/41/41I BLOCK DIAGRAM
FMDU
CTL
8051
PROCESSOR
SFR
RAM
MS
RAM
USB
Host
AUTO_CBW
PROC
PHY
FMI
XDATA BRIDGE
+ BUS ARBITER
BUS
INTFC
BUS
INTFC
BUS
INTFC
EP0 TX
EP0 RX
EP2 TX
EP2 RX
EP1 RX
EP1 TX
ROM
64 KB
RAM
10 KB
ADDR
MAP
PWR_FET1
Clock
Generation and
Control
SD/
MMC
4K
total
3.3 V
1.8 V Reg
VDD18
3.3 V
VDD18PLL
PLL
24 MHz
Crystal
SIE
CTL
1.8 V Reg
USB2240/40I
USB2241/41I*
xD*
Multiplexed
Interface
NOTE: xD-Picture Card is not applicable to USB2241/41i.
CRD_PWR
SPI
Interface
SPI
Interface
Trace FIFO
Program Memory I/O Bus
USB224X
DS00001979A-page 6
2010 - 2015 Microchip Technology Inc.
FIGURE 3-2:
USB2244/44I BLOCK DIAGRAM
FMDU
CTL
8051
PROCESSOR
SFR
RAM
SD/
MMC
RAM
USB
Host
AUTO_CBW
PROC
PHY
FMI
XDATA BRIDGE
+ BUS ARBITER
BUS
INTFC
BUS
INTFC
BUS
INTFC
EP0 TX
EP0 RX
EP2 TX
EP2 RX
EP1 RX
EP1 TX
ROM
64 KB
RAM
10 KB
ADDR
MAP
PWR_FET1
CRD_PWR
Clock
Generation and
Control
4K
total
3.3 V
1.8 V Reg
VDD18
3.3 V
VDD18PLL
PLL
24 MHz
Crystal
SIE
CTL
1.8 V Reg
USB2244/USB2244I
Media
Interface
SPI
Interface
SPI
Interface
Trace FIFO
Program Memory I/O Bus
2010 - 2015 Microchip Technology Inc.
DS00001979A-page 7
USB224X
4.0
PIN CONFIGURATIONS
FIGURE 4-1:
USB2240/USB2240I 36-PIN QFN DIAGRAM
Ground Pad
(must be connected to VSS)
USB2240/2240I
(Top View QFN-36)
Indicates pins on the bottom of the device.
26
xD_
D
6 /
SD_D3
/ MS_
D
3
25
SD_nCD
24
xD_
D
5 /
SD_D2
23
MS
_I
NS
22
VDD33
21
CRD_
PWR
20
19
RXD /
S
D
A
27
18
17
16
15
14
13
12
11
10
28
29
31
32
33
36
35
34
30
1
2
3
4
5
6
7
8
9
TEST
NC
xD_D4 / (SD_WP) / MS_SCLK
TXD / SCK / MS_SKT_SEL
XTAL2
XTAL1 (CLKIN)
VDD18PLL
RBIAS
VDDA33
LE
D
USB+
USB-
x
D
_D
3
/
SD
_D
1
/
M
S
_
D
5
x
D
_D
2
/
SD
_D
0
/
M
S
_
D
4
VDD3
3
xD_
D
0
/ S
D
_D6 /
MS_
D
7
xD_n
WP /
SD_CL
K
/
MS_
B
S
xD_ALE / SD_D5 / MS_D1
VDD18
xD_nWE
xD_CLE / SD_CMD / MS_D0
xD_nCE
xD_nRE
xD_nB/R
RESET_N
(x
D
_nCD)
x
D
_
D
7 /
SD
_D
4
/
M
S
_
D
2
xD_
D
1
/ S
D
_D7 /
MS_
D
6
VDD33
USB224X
DS00001979A-page 8
2010 - 2015 Microchip Technology Inc.
FIGURE 4-2:
USB2241/USB2241I 36-PIN QFN DIAGRAM
Ground Pad
(must be connected to VSS)
USB2241/2241I
(Top View QFN-36)
Indicates pins on the bottom of the device.
26
SD_D3 /
M
S
_D3
25
SD_nCD
24
SD_D2
23
MS
_
IN
S
22
VDD33
21
CRD
_
P
W
R
20
19
RXD / SDA
27
18
17
16
15
14
13
12
11
10
28
29
31
32
33
36
35
34
30
1
2
3
4
5
6
7
8
9
TEST
NC
SD_WP / MS_SCLK
TXD / SCK / MS_SKT_SEL
XTAL2
XTAL1 (CLKIN)
VDD18PLL
RBIAS
VDDA33
LE
D
USB+
USB-
SD_D1
/
M
S
_D5
SD_D0
/
M
S
_D4
VDD33
SD_D6
/
M
S
_D7
SD_CLK /
M
S
_
B
S
SD_D5 / MS_D1
VDD18
NC
SD_CMD / MS_D0
NC
NC
NC
RESET_N
NC
S
D
_D4 / MS_D2
SD_D7
/
M
S
_D6
VDD33
2010 - 2015 Microchip Technology Inc.
DS00001979A-page 9
USB224X
FIGURE 4-3:
USB2244/USB2244I 36-PIN QFN DIAGRAM
Ground Pad
(must be connected to VSS)
USB2244/2244I
(Top View QFN-36)
Indicates pins on the bottom of the device.
26
SD
_
D
3
25
SD
_
n
C
D
24
SD
_
D
2
23
NC
22
VD
D
3
3
21
CRD
_P
WR
20
19
RX
D
/
S
D
A
27
18
17
16
15
14
13
12
11
10
28
29
31
32
33
36
35
34
30
1
2
3
4
5
6
7
8
9
TEST
NC
SD_WP
TXD / SCK
XTAL2
XTAL1 (CLKIN)
VDD18PLL
RBIAS
VDDA33
LED
USB+
US
B-
S
D
_D
1
SD
_
D
0
VDD33
SD
_D
6
SD_
C
L
K
SD_D5
VDD18
NC
SD_CMD
NC
NC
NC
RESET_N
NC
SD
_
D
4
SD
_D
7
VDD33
USB224X
DS00001979A-page 10
2010 - 2015 Microchip Technology Inc.
5.0
PIN TABLES
TABLE 5-1:
USB2240/2240I 36-PIN QFN PACKAGE
xD/SD/MS INTERFACE (18 PINS)
xD_D3 /
SD_D1 /
MS_D5
xD_D2 /
SD_D0 /
MS_D4
xD_D1 /
SD_D7 /
MS_D6
xD_D0 /
SD_D6 /
MS_D7
xD_nWP /
SD_CLK /
MS_BS
xD_ALE /
SD_D5 /
MS_D1
xD_CLE /
SD_CMD /
MS_D0
xD_D7 /
SD_D4 /
MS_D2
xD_D6 /
SD_D3 /
MS_D3
xD_D5 / SD_D2
xD_nRE
xD_nWE
xD_D4 /
SD_WP /
MS_SCLK
xD_nB/R
xD_nCE
MS_INS
xD_nCD
SD_nCD
USB INTERFACE (5 PINS)
USB+
USB-
XTAL1 (CLKIN)
XTAL2
RBIAS
MISC (7 Pins)
LED
RXD /
SDA
NC
TXD /
SCK /
MS_SKT_SEL
CRD_PWR
TEST
RESET_N
DIGITAL, POWER (6 PINS)
(3) VDD33
VDDA33
VDD18
VDD18PLL
TOTAL 36