USB2241 SMSC Corporation, USB2241 Datasheet - Page 15

• Manufacturer Part Number: USB2241
• Description: (USB2240 / USB2241) Ultra Fast USB 2.0 Multi-Format Flash Media Controller
• Manufacturer: SMSC Corporation

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Ultra Fast USB 2.0 Multi-Format Flash Media Controller
Datasheet
SMSC USB2240/USB2241
MS Card
Insertion GPIO
SD Data
SD Clock
SD Command
SD Write
Protected GPIO
SD Card Detect
GPIO
USB Bus Data
USB
Transceiver
Bias
24MHz Crystal
or external
clock input
24MHz Crystal
General
Purpose I/O
NAME
GPIO12
(MS_INS)
SD_D[7:0]
SD_CLK
SD_CMD
GPIO6
(SD_nWP)
GPIO15
(SD_nCD)
USB+
USB-
RBIAS
XTAL1
(CLKIN)
XTAL2
GPIO1
(LED1)
Table 5.1 USB2240/USB2241 36-Pin QFN Pin Descriptions (continued)
SYMBOL
24
7
8
10
20
23
25
4
5
9
11
30
26
2
3
35
33
32
1
36-PIN
QFN
SECURE DIGITAL INTERFACE
IPU
I/O12PU
O12
I/O12PU
I/O12
I/O12
I/O-U
ICLKx
OCLKx
I/O12
USB INTERFACE
I-R
DATASHEET
BUFFER
TYPE
MISC
15
This is a GPIO designated as the Memory Stick
The bi-directional signals should have weak pull-up
This is an output clock signal to SD/MMC device.
This is a bi-directional signal that connects to the
This is a GPIO designated as the Secure Digital
This is a GPIO designated as the Secure Digital
These pins connect to the USB bus data signals.
this pin in order to set the transceiver's internal bias
currents.
This pin can be connected to one terminal of the
crystal or can be connected to an external 24 clock
when a crystal is not used.
This is the other terminal of the crystal, or left open
when an external clock source is used to drive
XTAL1/CLKIN. It may not be used to drive any
external circuitry other than the crystal circuit.
This pin may be used either as input, edge sensitive
interrupt input, or output.
In addition, as an output, the GPIO1 can be used
output controlled by the LED1_GPIO1 register.
card detection pin.
resistors. The register can be controlled by:
SD_MMC_INTF_EN bit of SDC_MODE_CTL
The clock frequency is software configurable.
CMD signal of SD/MMC device. The bi-directional
signal should have an internal weak pull-up resistor.
The pull-up register can be controlled by:
SD_MMC_INTF_EN bit of SDC_MODE CTL
card mechanical write detect pin.
card detection pin.
A 12.0k , 1.0% resistor is attached from VSSA to
DESCRIPTION
Revision 2.6 (05-08-08)
TM