SMSC USB2601 - Manual (Page 17)

4th Generation USB 2.0 Flash Media Controller with Integrated Card Power FETs & HS Hub
Datasheet
SMSC USB2601/USB2602 17 Revision 1.6 (06-20-08)
DATASHEET
SM
Chip Enable
SM_nCE O8PU 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.
08 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
SM_nCD IPU 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.
MEMORY STICK INTERFACE
MS
Bus State
MS_BS O8 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
MS_SDIO/MS_
D0
I/O8PD 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
MS_D1 I/O8PD 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
MS_D[3:2] I/O8PD 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
MS_INS IPU 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.
MS
System CLK
MS_SCLK O8 This pin is an output clock signal to the MS device.
The clock frequency is software configurable.
SD INTERFACE
SD
Data [3:0]
SD_DAT[3:0] I/O8PU These are bi-directional data signals.
These pins have internally controlled weak pull-up
resistors.
SD Clock SD_CLK O8 This is an output clock signal to SD/MMC device.
The clock frequency is software configurable.
NAME SYMBOL
BUFFER
TYPE DESCRIPTION