TWR-K60N512-KEIL Freescale Semiconductor, TWR-K60N512-KEIL Datasheet - Page 121

• 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

Chapter 13
USB Device Charger Detection (USBDCD) Module
13.1 Overview
This chapter intends to show the general configuration sequence and the service routines
needed to be able to detect the host type and charger that is connected to the USB
module.
13.1.1 Introduction
The USB battery charger specification defines limits, detection, control, and reporting
mechanisms that permit devices to draw current in excess of the USB 2.0 specification
for charging or powering up from dedicated chargers, hosts, and hubs, and for charging
downstream ports. These mechanisms are backward-compatible with USB 2.0 compliant
hosts and peripherals. The USB ports on personal computers are convenient places for
portable devices to draw current for charging their batteries. This convenience has led to
the creation of USB chargers that expose a USB standard-A receptacle. This allows
portable devices to use the same USB cable to charge from either a PC or from a USB
charger. Freescale Kinetis microprocessors include a device charger detection (DCD)
module capable of identifying if the device is connected to a PC host or to a USB
dedicated charger.
13.1.2 Features
The USBDCD module works with the USB transceiver to detect if the USB device is
attached to a charging port (either a dedicated charging port or a charging host). The
system software coordinates the detection activities of the module and controls an off-
chip integrated circuit that performs the battery charging. The main features of the DCD
module are the following:
Freescale Semiconductor
• USB battery charger specification compliant (rev 1.1)
• Programmable timing parameters
Kinetis Quick Reference User Guide, Rev. 0, 11/2010
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