Microchip Technology TDGL019 Data Sheet
© 2011-2014 Microchip Technology Inc.
DS60001168F-page 121
PIC32MX1XX/2XX
10.0
USB ON-THE-GO (OTG)
The Universal Serial Bus (USB) module contains
analog and digital components to provide a USB 2.0
Full-Speed and Low-Speed embedded host, Full-
Speed device or OTG implementation with a minimum
of external components. This module in Host mode is
intended for use as an embedded host and therefore
does not implement a UHCI or OHCI controller.
The USB module consists of the clock generator, the
USB voltage comparators, the transceiver, the Serial
Interface Engine (SIE), a dedicated USB DMA control-
ler, pull-up and pull-down resistors, and the register
interface. A block diagram of the PIC32 USB OTG
module is presented in
analog and digital components to provide a USB 2.0
Full-Speed and Low-Speed embedded host, Full-
Speed device or OTG implementation with a minimum
of external components. This module in Host mode is
intended for use as an embedded host and therefore
does not implement a UHCI or OHCI controller.
The USB module consists of the clock generator, the
USB voltage comparators, the transceiver, the Serial
Interface Engine (SIE), a dedicated USB DMA control-
ler, pull-up and pull-down resistors, and the register
interface. A block diagram of the PIC32 USB OTG
module is presented in
The clock generator provides the 48 MHz clock
required for USB Full-Speed and Low-Speed communi-
cation. The voltage comparators monitor the voltage on
the V
required for USB Full-Speed and Low-Speed communi-
cation. The voltage comparators monitor the voltage on
the V
BUS
pin to determine the state of the bus. The
transceiver provides the analog translation between
the USB bus and the digital logic. The SIE is a state
machine that transfers data to and from the endpoint
buffers and generates the hardware protocol for data
transfers. The USB DMA controller transfers data
between the data buffers in RAM and the SIE. The inte-
grated pull-up and pull-down resistors eliminate the
need for external signaling components. The register
interface allows the CPU to configure and
communicate with the module.
The PIC32 USB module includes the following
features:
• USB Full-Speed support for Host and Device
• Low-Speed Host support
• USB OTG support
• Integrated signaling resistors
• Integrated analog comparators for V
the USB bus and the digital logic. The SIE is a state
machine that transfers data to and from the endpoint
buffers and generates the hardware protocol for data
transfers. The USB DMA controller transfers data
between the data buffers in RAM and the SIE. The inte-
grated pull-up and pull-down resistors eliminate the
need for external signaling components. The register
interface allows the CPU to configure and
communicate with the module.
The PIC32 USB module includes the following
features:
• USB Full-Speed support for Host and Device
• Low-Speed Host support
• USB OTG support
• Integrated signaling resistors
• Integrated analog comparators for V
BUS
monitoring
• Integrated USB transceiver
• Transaction handshaking performed by hardware
• Endpoint buffering anywhere in system RAM
• Integrated DMA to access system RAM and Flash
• Transaction handshaking performed by hardware
• Endpoint buffering anywhere in system RAM
• Integrated DMA to access system RAM and Flash
Note 1:
This data sheet summarizes the features
of the PIC32MX1XX/2XX family of
devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to Section 27. “USB On-
The-Go (OTG)”
of the PIC32MX1XX/2XX family of
devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to Section 27. “USB On-
The-Go (OTG)”
(DS60001126) in the
“PIC32 Family Reference Manual”
, which
is available from the Microchip web site
(
(
).
2:
Some registers and associated bits
described in this section may not be
available on all devices. Refer to
described in this section may not be
available on all devices. Refer to
in
this data sheet for device-specific register
and bit information.
and bit information.
Note:
The implementation and use of the USB
specifications, as well as other third party
specifications or technologies, may
require licensing; including, but not limited
to, USB Implementers Forum, Inc., also
referred to as USB-IF (
specifications, as well as other third party
specifications or technologies, may
require licensing; including, but not limited
to, USB Implementers Forum, Inc., also
referred to as USB-IF (
). The
user is fully responsible for investigating
and satisfying any applicable licensing
obligations.
and satisfying any applicable licensing
obligations.