Datasheet – SMSC USB2601 User Manual
Page 16
4th Generation USB 2.0 Flash Media Controller with Integrated Card Power FETs & HS Hub
Datasheet
Revision 1.6 (06-20-08)
16
SMSC USB2601/USB2602
DATASHEET
CF
IO Read
CF_nIOR
O8
This pin is an active low read strobe signal for CF
device.
CF
IO Write Strobe
CF_nIOW
O8
This pin is an active low write strobe signal for CF
device.
SmartMedia INTERFACE
SM
Write Protect
SM_nWP
O8PD
This pin is an active low write protect signal for the SM
device.
This pin has a weak pull-down resistor that is
permanently enabled
SM
Address Strobe
SM_ALE
O8PD
This pin is an active high Address Latch Enable signal
for the SM device.
This pin has a weak pull-down resistor that is
permanently enabled
SM
Command Strobe
SM_CLE
O8PD
This pin is an active high Command Latch Enable signal
for the SM device.
This pin has a weak pull-down resistor that is
permanently enabled
SM
Data[7:0]
SM_D[7:0]
I/O8PD
These pins are the bi-directional data signal SM_D7-
SM_D0.
The bi-directional data signal has an internal weak pull-
down resistor.
SM
Read Enable
SM_nRE
08PU
This pin is an active low read strobe signal for 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
Write Enable
SM_nWE
O8PU
This pin is an active low write strobe signal for 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
Write Protect Switch
SM_nWPS
IPU
A write-protect seal is detected, when this pin is low.
This pin has an internally controlled weak pull-up
resistor.
SM
Busy or Data Ready
SM_nB/R
I
This pin is connected to the BSY/RDY pin of the SM
device.
An external pull-up resistor is required on this signal.
The pull-up resistor must be pulled up to the same
power source that powers the SM/NAND flash device.
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION