DevKit8500D/A User Manual - DMCS Pages for Students

Chapter 2 Hardware System
2.1 CPU
2.1.1 CPU Introduction
As a high-performance processor for enhanced digital media, DM37x/AM37x employs TI 45nm
advanced industrial technology; this architecture has the advantage of low power consumption at
the same time of being designed for ARM and graphical demonstration.
The Texas Instruments’ DM3730 DaVinci digital media processor is powered by up to 1-GHz
(also supports 300, 600, and 800-MHz operation) ARM Cortex-A8 and 800-MHz (also supports
250, 520 and 660-MHz operation) C64x+ DSP core, and has integrated 3D graphics processor,
imaging and video accelerator (IVA), USB 2.0, MMC/SD memory card, UART and many more.
DaVinci DM3730 video processor is pin-to-pin compatible with Sitara AM37x devices and software
compatible with the OMAP35x processors. The C64x+ DSP and hardware video accelerator
enable audio and HD 720p video decoding and encoding independent of the ARM processor. The
programmable DSP engine allows multiple signal processing tasks such as image processing and
analysis, digital filtering, and math functions. DaVinci DM3730 video processor is suitable for 720p
HD (High Definition) video applications which require large amount of data processing.
2.1.2 CPU Features
Clock
The CPU clock includes sys_32k, sys_altclk, sys_clkout1, sys_clkout2, sys_xtalout, sys_xtalin,
sys_clkreq.
The sys_32k 32-kHz clock is used for low frequency operation. It supplies the wake-up domain
signals for operating in lowest power mode (off mode). This clock is provided through the sys_32k
pin. The 32-kHz is generated by power management.
The sys_xtalin / sys_xtalout system input clock (26 MHz) is used to generate the main source
clock for the device. It supplies the DPLLs as well to several other modules.
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