Xycom Xembedded XPMC-6710, Справочное руководство

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XPMC-6710 PrPMC Hardware Reference Manual
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Freescale MPC7448 PPC Processor
The XPMC-6710 brings the Freescale MPC7448 processor to PrPMC, the most significant
MPC74xx line of processors to date. The MPC7448 is a high-performance processor
manufactured on 90 nanometer silicon-on-insulator (SOI) process technology with extensive
processing performance at very low power. The MPC7448 implements the full PowerPC
32-bit architecture and is designed to perform between 600 MHz and in excess of 1.5 GHz,
with a full 1 Mbyte of L2 cache and ECC, while offering enhanced power management
capabilities. The XPMC-6710 with the MPC7448 processor is ideal for leading-edge pervasive
computing, embedded network control and signal processing applications.
AltiVec Engine Acceleration
The MPC7448 includes the same powerful 128-bit AltiVec vector execution unit as found in
previous MPC74xx devices, but with the enhanced support for out-of-order instructions.
AltiVec technology may dramatically enhance the performance of applications such as voice
over IP, speech recognition, multi-channel modems, virtual private network servers,
high-resolution 3D graphics, motion video (MPEG2, MPEG4), high fidelity audio (3D audio,
AC-3), and so on.
AltiVec computational instructions are executed in the four independent, pipelined AltiVec
execution units. A maximum of two AltiVec instructions can be issued in order to any
combination of AltiVec execution units per clock cycle. In the MPC7448, a maximum of two
AltiVec instructions can be issued out-of-order to any combination of AltiVec execution units
per clock cycle from the bottom two AltiVec instruction queue entries. For example, an
instruction in queue 1 destined for AltiVec integer unit 1 does not have to wait for an
instruction in queue 0 that is stalled behind an instruction waiting for operand availability.
Power Management
Continuing to pursue lower and lower power consumption is a keen focus with the Freescale
family of Power Architecture processors, and the MPC7448 is no exception. Power
management features include:
• Expanded Dynamic Frequency Switching (DFS) enabling software to change power
consumption
• Nap and Sleep modes
• Voltage scaling down to at least 1.0V
• Added benefits of 90-nm technology
• Multi-Vt and Triple Gate Oxide integrated transistors for low standby power
• Low-K Dielectric for high performance with reduced power and noise
• Temperature sensing diodes included to monitor die temperature