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PDF I.MX31L Datasheet ( Hoja de datos )

Número de pieza I.MX31L
Descripción Multimedia Applications Processors
Fabricantes Freescale Semiconductor 
Logotipo Freescale Semiconductor Logotipo
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I.MX31L datasheet

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I.MX31L pdf
The following techniques are used to reduce static power consumption:
• Active Well Bias (AWB)
• Power gating
• A variety of low-power modes
• Special techniques for fast wake-up times from low-power modes
The following techniques are used to reduce dynamic power consumption:
• Dynamic process and temperature compensation
• Automatic dynamic voltage frequency scaling
• Low-power clocking scheme
Features
2.3 External Memory Interface (EMI)
To allow the maximum number of potential designs, the External Memory Interface of the i.MX31 and
i.MX31L processors provide support for the following memory types:
• SRAM, NOR Flash and PSRAM—32/16-bit, Disk-On-Chip
• SDRAM, SyncFlash™, VSyncFlash™—133 MHz, 32/16-bit
• DDR—266 MHz, 32/16-bit
• NAND Flash and SmartMedia (dedicated 8-bit, shared 16-bit)
2.4 Smart Multimedia
Multimedia is one of the most important features for today’s mobile devices. The i.MX31 and i.MX31L
processors’ Smart Multimedia not only provide support, but more importantly, they provide multimedia
hardware acceleration for a wide variety of multimedia applications at performance levels that are the
equivalent of ARM11 processor performance of more than 3 GHz. The optimized hardware acceleration
enables some typical applications to operate without ARM CPU involvement—for example, the
viewfinder.
The i.MX31 and i.MX31L processors’ Smart Multimedia are able to do the following:
• Enable simultaneous MPEG4 Simple Profile (SP) video encoding and decoding.
• Support real-time video decode in any of the following advanced formats:
— MPEG4 Simple Profile (SP)
— H.264
— WMV (Windows Media™ Video)
— RV (RealVideo™)
— MPEG2
— DiVX
• Provide video and image data pre/post-processing (resizing, color conversion, filtering) that is fully
hardware accelerated.
i.MX31 and i.MX31L Multimedia Applications Processors Product Brief, Rev. 0.6
Freescale Semiconductor
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I.MX31L arduino
Features
2.8.1 High Speed USB 2.0 Interface
The i.MX31 and i.MX31L processors each support three independent USB 2.0 ports, two of which support
high speed (HS) operation:
• OTG—High speed (480 Mbps)
• Host 1—High speed (480 Mbps)
• Host 2—Full speed (12 Mbps)
The ability of the i.MX31 and i.MX31L processors to provide an HS USB connection allows you to deliver
a product that can download 500 Mbytes of video in 15 seconds, in contrast to nearly 10 minutes using full
speed. The USB connectivity of either i.MX31 or i.MX31L processor provides extremely fast
synchronization with a PC or between two devices. Any of the USB ports may be used for transceiver-free
connection, or for external transceiver-based connection.
The USB OTG port can connect to a PC as either a device or as a host to any of the following peripherals:
keyboard, printer, mouse, speakers, storage device, digital camera, and so on. It supports 16 endpoints for
each host and device.
USB Host 1 is typically connected to dedicated ICs that support WLAN, Bluetooth™ wireless technology,
and GPS. Host 1 supports 16 endpoints. USB Host 2 is typically used to connect to ICs for baseband or
WLAN, Bluetooth wireless technology, or GPS. Host 2 supports 4 endpoints.
2.8.2 Audio Flexible Interconnect
The Digital Audio Mux (AUDMUX) provides a programmable interconnect fabric for voice, audio, and
synchronous data routing between each i.MX31 and i.MX31L processors’ SSI modules and external SSI,
audio, and voice codecs. The AUDMUX is designed so that resource configurations do not need to be
hard-wired, but instead, can be shared in many different configurations. The AUDMUX interconnections
allow multiple simultaneous separate audio/voice/data flows between the ports in a point-to-point or
point-to-multipoint configuration(s).
In a typical scenario, the AUDMUX and two SSI/I2S modules provide interfaces to the Serial Audio Port
of the cellular baseband (BB) processor, narrowband (NB), and wideband (WB) audio ports of the external
audio AD/DA and the audio port of the Bluetooth wireless technology on-board peripheral. See Figure 8.
i.MX31 and i.MX31L Multimedia Applications Processors Product Brief, Rev. 0.6
Freescale Semiconductor
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