USB2660 Standard Microsystems Corp., USB2660 Datasheet - Page 15

• Manufacturer Part Number: USB2660
• Description: Ultra Fast Usb 2.0 Hub And Multi-format Flash Media Controller With Dual Sd Interfaces
• Manufacturer: Standard Microsystems Corp.

Ultra Fast USB 2.0 Hub and Multi-Format Flash Media Controller with Dual SD Interfaces
Datasheet
Chapter 6 Pin Descriptions
SMSC USB2660/USB2660i
6.1
SD1_D[7:0]
SD1_CMD
SD1_CLK
SD1_nCD
SYMBOL
GPIO15 /
This section provides a detailed description of each signal. The signals are arranged in functional
groups according to their associated interface. The pin descriptions below are applied when using the
internal default firmware and can be referenced in
Please reference
The “n” symbol in the signal name indicates that the active, or asserted, state occurs when the signal
is at a low voltage level. When “n” is not present in the signal name, the signal is asserted at a high
voltage level.
The terms assertion and negation are used exclusively. This is done to avoid confusion when working
with a mixture of “active low” and “active high” signals. The term assert, or assertion, indicates that a
signal is active, independent of whether that level is represented by a high or low voltage. The term
negate, or negation, indicates that a signal is inactive.
USB2660/USB2660i Pin Descriptions
64-PIN
QFN
27
28
31
38
40
41
25
26
29
32
22
(Table
BUFFER
Chapter 2, "Acronyms," on page 10
I/O8PU
I/O8PU
I/O8PU
Table 6.1 USB2660/USB2660i Pin Descriptions
TYPE
I/O6
O8
6.2)
SECURE DIGITAL INTERFACE
Secure Digital Command
This general purpose pin may be used either as input, edge sensitive
Secure Digital Card Detect GPIO
DESCRIPTION
Secure Digital Data 7-0
These are the bi-directional data signals SD_D0 - SD_D7 with weak
pull-up resistors.
Secure Digital Clock
This is an output clock signal to the SD/MMC device.
This is a bi-directional signal that connects to the CMD signal of the
SD/MMC device. The bi-directional signal has a weak internal pull-up
resistor.
interrupt input, or output. Custom firmware is required to activate this
function.
This is a GPIO designated by the default firmware as the Secure
Digital card detection pin and has an internal pull-up.
DATASHEET
15
Chapter 8, "Configuration Options," on page
for a list of the acronyms used.
Revision 1.0 (06-09-09)
29.