Datasheet – SMSC USB2601 User Manual
Page 18
4th Generation USB 2.0 Flash Media Controller with Integrated Card Power FETs & HS Hub
Datasheet
Revision 1.6 (06-20-08)
18
SMSC USB2601/USB2602
DATASHEET
SD Command
SD_CMD
I/O8PU
This is a bi-directional signal that connects to the CMD
signal of SD/MMC device.
This pin has an internally controlled weak pull-up
resistor.
SD
Write Protected
SD_nWP
IPD
This pin is an input signal with an internal weak pull-
down.
This pin has an internally controlled weak pull-down
resistor.
MISC
General Purpose
I/O
GPIO1
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
GPIO2
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
GPIO4
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
GPIO5
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
GPIO6
GPIO6
IPU
This pin has an internal weak pull-up resistor that is
enabled or disabled by the state of RESET_N.
The pull-up is enabled when RESET_N is active.
The pull-up is disabled, when the RESET_N is inactive
(some clock cycles later, after the rising edge of
RESET_N).
The state of this pin is latched internally on the rising
edge of RESET_N to determine if internal or external
program memory is used.
The state latched is stored in ROMEN bit of GPIO_IN1
register.
I/O8
After the rising edge of RESET_N, this pin may be used
as GPIO6.
When this pin is left unconnected or pulled high by a
weak pull-up resistor, the USB2601/USB2602 uses the
internal ROM for program execution.
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
GPIO7
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
Or
Card Power
GPIO8/
CRD_PWR0
I/O8
GPIO: This pin may be used either as input, edge
sensitive interrupt input, or output.
CRD_PWR: Card Power drive of 3.3V @ 100mA.
General Purpose
I/O
GPIO9
I/O8
This pin may be used either as input, edge sensitive
interrupt input, or output.
General Purpose
I/O
Or
Card Power
GPIO10/
CRD_PWR1
I/O8
GPIO: This pin may be used either as input, edge
sensitive interrupt input, or output.
CRD_PWR: Card Power drive of 3.3V @ 100mA.
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION