USB2228 SMSC Corporation, USB2228 Datasheet - Page 14

• Manufacturer Part Number: USB2228
• Description: (USB2227 / USB2228) 4th Generation USB2.0 Flash Media Controller
• Manufacturer: SMSC Corporation

Revision 1.91 (10-13-06)
MS_SDIO/M
MS_D[3:2]
SYMBOL
SM_nCD
SM_nCE
MS_INS
MS_BS
MS_D1
S_D0
128-PIN
VTQFP
83
78
24
19
20
22
21
18
124-PIN
DQFN
A42
B37
A12
A10
A11
B10
B9
A9
MEMORY STICK INTERFACE
4th Generation USB2.0 Flash Media Controller with Integrated Card Power FETs
BUFFER
I/O8PD
I/O8PD
I/O8PD
O8PU
TYPE
IPU
IPU
O8
08
DATASHEET
14
SM Chip Enable:
This pin is the active low chip enable signal to the SM
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.
If an external FET is used (Internal FET is disabled),
then the internal pull-up is not available (external pull-
ups must be used, and should be connected to the
applicable Card Power Supply).
SM Card Detection:
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.
MS Bus State:
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.
MS System Data In/Out:
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.
MS System Data In/Out:
This pin is a bi-directional data signal for the MS device.
This pin has internally controlled weak pull-up and pull-
down resistors for various operational modes.
MS System Data In/Out:
This pin is a bi-directional data signal for the MS device.
The bi-directional data signal has an internal weak pull-
down resistor.
MS Card Insertion:
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.
DESCRIPTION
SMSC USB2227/USB2228
Datasheet