User`s guide

About This Guide
i.MX53 System Development User’s Guide, Rev. 1
Freescale Semiconductor xxii
RGBA RGBA color space stands for Red Green Blue Alpha. The alpha channel is the transparency channel, and
is unique to this color space. RGBA, like RGB, is an additive color space, so the more of a color you place,
the lighter the picture gets. PNG is the best known image format that uses the RGBA color space.
RNGA Random Number Generator Accelerator—a security hardware module that produces 32-bit pseudo random
numbers as part of the security module.
ROM Read Only Memory
ROM bootstrap Internal boot code encompassing the main boot flow as well as exception vectors.
RTIC Real-time integrity checker—a security hardware module
SCC SeCurity Controller—a security hardware module
SDMA Smart Direct Memory Access
SDRAM Synchronous Dynamic Random Access Memory
SoC System on a Chip
SPBA Shared Peripheral Bus Arbiter—a three-to-one IP-Bus arbiter, with a resource-locking mechanism.
SPI Serial Peripheral Interface—a full-duplex synchronous serial interface for connecting
low-/medium-bandwidth external devices using four wires. SPI devices communicate using a master/slave
relationship over two data lines and two control lines: Also see SS, SCLK, MISO, and MOSI.
SRAM Static Random Access Memory
SSI Synchronous-Serial Interface—standardized interface for serial data transfer
TBD To Be Determined
UART Universal Asynchronous Receiver/Transmitter—this module provides asynchronous serial communication
to external devices.
UID Unique ID–a field in the processor and CSF identifying a device or group of devices
USB Universal Serial Bus—an external bus standard that supports high speed data transfers. The USB 1.1
specification supports data transfer rates of up to 12Mb/s and USB 2.0 has a maximum transfer rate of
480 Mbps. A single USB port can be used to connect up to 127 peripheral devices, such as mice, modems,
and keyboards. USB also supports Plug-and-Play installation and hot plugging.
USBOTG USB On The Go—an extension of the USB 2.0 specification for connecting peripheral devices to each other.
USBOTG devices, also known as dual-role peripherals, can act as limited hosts or peripherals themselves
depending on how the cables are connected to the devices, and they also can connect to a host PC.
Word A group of bits comprising 32 bits
Definitions and Acronyms (continued)
Term Definition