TWR-K60N512-KEIL Freescale Semiconductor, TWR-K60N512-KEIL Datasheet - Page 134

• Manufacturer Part Number: TWR-K60N512-KEIL
• Description: K60N512 Keil Tower Kit
• Manufacturer: Freescale Semiconductor
• Series: Kinetisr
• Type: MCUr

Specifications of TWR-K60N512-KEIL

• Rohs Compliant: YES
• Contents: 4 Boards, Documentation, DVD
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Freescale Tower System, K60N512

Hardware implementation
This mode is used when the application can be connected to a PC or is able to handle
external USB devices, such as fingerprint readers, mice, USB flash drives, and so on. The
application running on the MCU will be configured in device mode (not applying 5 V to
the VBUS line) until the ID signals become low. This indicates that a host mode
reconfiguration is needed, and 5 V is then applied to the VBUS signal using the external
IC.
14.6.2 Components and placement suggestions
134
• The MCU does not include a signal for supplying the 5 V VBUS power for the USB.
• The power distribution circuit must have over-current detection capability to be
• The 33 Ω series termination resistors are recommended for the FS and LS USB
An external power management chip or discrete logic for enabling VBUS is required
for the host operation.
compliant with the USB standard.
transceiver. These series termination resistors must be placed as close as possible to
the transceiver to maximize the eye diagram for the data lines.
Kinetis Quick Reference User Guide, Rev. 0, 11/2010
Figure 14-10. Dual role diagram
Freescale Semiconductor