
Table 46-1. Acronyms and Abbreviated Terms (continued)
Term
Meaning
OTG
On-The-Go
RDM_DWN
D- pulldown resistance for data pin contact detect
VDAT_REF
Data detect reference voltage for the voltage comparator
VDP_SRC
Voltage source for the D+ line
VLGC
Threshold voltage for logic high
46.1.3 Glossary
The following table shows a glossary of terms used in this document.
Table 46-2. Glossary of Terms
Term
Definition
Transceiver
Module that implements the physical layer of the USB standard (FS or LS only)
PHY
Module that implements the physical layer of the USB standard (HS capable)
Attached
Device is physically plugged into USB port but has not enabled either D+ or D- pullup resistor
Connected
Device is physically plugged into USB port and has enabled either D+ or D- pullup resistor
Suspended
After 3 ms of no bus activity the USB device enters suspend mode.
Component
The hardware and software that make up a subsystem.
46.2 Introduction
NOTE
For the chip-specific implementation details of this module's
instances see the chip configuration chapter.
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). System
software coordinates the detection activites of the module and controls an off-chip
integrated circuit that performs the battery charging.
46.2.1 Block Diagram
The following figure is a high level block diagram of the module.
Introduction
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
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Freescale Semiconductor, Inc.