USB2412-DZK Standard Microsystems (SMSC), USB2412-DZK Datasheet - Page 13

• Manufacturer Part Number: USB2412-DZK
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2412-DZK

• Lead Free Status / RoHS Status: Supplier Unconfirmed

2-Port USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB2412
3.5
3.6
BUFFER
OCLKx
ICLKx
I/O12
I/O-U
I-R
IS
The strap function of pins 13 and 19 are enabled thru the internal default configuration. The driver type
of each strap pin is I/O (no internal pull-up or pull-down for the input function). Use this type of strap
option for NON_REM[1:0].
High configuration to set the strap option value to a ‘1’. Use the Strap Low configuration to set the
strap option value to ‘0’.
The strap function of pins 13 and 19 are enabled thru the internal default configuration. The driver type
of each strap pin is I/O (no internal pull-up or pull-down for the input function). When the strap pin
shares functionality with an LED, use this type of strap option.
The internal logic will drive the LED appropriately (active high or low) depending on the sampled strap
option.
to set the strap option value to a ‘1’. Use the Strap Low configuration to set the strap option value to ‘0’.
Non-Removable Strap Option
LED Strap Option
Strap Pin
HUB
Strap Pin
Figure 3.3
HUB
Input with Schmitt trigger.
Input/Output buffer with 12 mA sink and 12 mA source.
XTAL clock input.
XTAL clock output.
RBIAS.
Analog Input/Output defined in USB specification.
shows an example of Strap High and Strap Low. Use the Strap High configuration
Table 3.3 Buffer Type Descriptions (continued)
Figure 3.2 Non-Removable Pin Strap Example
50
kΩ
+V
Figure 3.3 LED Pin Strap Example
50 kΩ
Figure 3.2
Primary Function/
Strap High
Strap High
LED/
DATASHEET
shows an example of Strap High and Strap Low. Use the Strap
13
DESCRIPTION
Strap Pin
HUB
Strap Pin
HUB
kΩ
50
GND
50 kΩ
Strap Low
Primary Function/
Revision 1.0 (02-12-10)
LED/
Strap Low