EVB-USB4640 SMSC, EVB-USB4640 Datasheet - Page 18

• Manufacturer Part Number: EVB-USB4640
• Description: EVALUATION BOARD FOR USB4640
• Manufacturer: SMSC

Specifications of EVB-USB4640

• Main Purpose: Interface, USB 2.0 Hub
• Embedded: *
• Utilized Ic / Part: USB4640
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1107

Revision 1.0 (06-09-09)
SYMBOL
GPIO14 /
xD_nB/R
xD_nWE
xD_nCE
xD_CLE
xD_nCD
xD_nRE
48-PIN
QFN
28
26
24
29
27
22
Table 6.1 USB4640/USB4640i Pin Descriptions (continued)
(Table
BUFFER
O8PU
O8PD
O8PU
O8PU
TYPE
I/O6
I/O8
IPU
6.2)
DESCRIPTION
xD-Picture Card Busy or Data Ready
This pin is connected to the BSY/RDY pin of 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 (the internal FET is disabled), then the
internal pull-up is not available (an external pull-up is required).
xD-Picture Card Chip Enable
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-
Picture Card device. This pin has a weak pull-down resistor that is
permanently enabled.
This general purpose pin may be used either as input, edge sensitive
interrupt input, or output. Custom firmware is required to activate this
function.
xD-Picture Card Detection GPIO
This is a GPIO designated by the default firmware as the xD-Picture
Card detection pin and has an internal pull-up.
xD-Picture Card Read Enable
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).
xD-Picture Card Write Enable
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).
DATASHEET
High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
18
SMSC USB4640/USB4640i
Datasheet