Information

Table 43-1. Acronyms and Abbreviated Terms (continued)
Term Meaning
OTG On-The-Go
R
DM_DWN
D- pulldown resistance for data pin contact detect
V
DAT_REF
Data detect reference voltage for the voltage comparator
V
DP_SRC
Voltage source for the D+ line
V
LGC
Threshold voltage for logic high
43.1.3 Glossary
The following table shows a glossary of terms used in this document.
Table 43-2. 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.
43.2 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.
43.2.1 Block Diagram
The following figure is a high level block diagram of the module.
Introduction
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
1090 Freescale Semiconductor, Inc.