USB2660 Standard Microsystems Corp., USB2660 Datasheet - Page 18

• 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.

Revision 1.0 (06-09-09)
SYMBOL
GPIO14 /
xD_nWE
xD_nWP
xD_nCD
xD_nCE
xD_CLE
xD_nRE
64-PIN
QFN
34
32
37
35
30
29
Table 6.1 USB2660/USB2660i Pin Descriptions (continued)
(Table
BUFFER
O8PU
O8PD
O8PU
O8PU
O8PD
TYPE
I/O6
I/O8
6.2)
Ultra Fast USB 2.0 Hub and Multi-Format Flash Media Controller with Dual SD Interfaces
xD-Picture Card Chip Enable
This general purpose pin may be used either as input, edge sensitive
xD-Picture Card Detection GPIO
xD-Picture Card Read Enable
xD-Picture Card Write Enable
DESCRIPTION
This pin is an active low chip enable signal for the xD-Picture Card
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 (an external pull-up is required).
xD-Picture Card Command Strobe
This pin is an active high Command Latch Enable signal for the xD
device. This pin has a weak pull-down resistor that is permanently
enabled.
interrupt input, or output. Custom firmware is required to activate this
function.
This is a GPIO designated by the default firmware as the xD-Picture
Card detection pin.
This pin is an active low read strobe signal for the xD-Picture Card
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 (an external pull-up is required).
This pin is an active low write strobe signal for the xD-Picture Card
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 (an external pull-up is required).
xD-Picture Card Write Protect
This pin is an active low write protect signal for the xD-Picture Card
device. This pin has a weak pull-down resistor that is permanently
enabled.
DATASHEET
18
SMSC USB2660/USB2660i
Datasheet