The basic system block diagram of a portable ultrasound system architecture is shown on this slide. On the left is shown the single core DSP, the C6455, and on the right is an OMAP system on chip, or SOC, the OMAP3530. In this instance, the 1.2 GHz DSP handles the B-mode, the color flow, and Spectral Doppler type functions, while the OMAP SOC takes care of the scan conversion, system control, and it can run a full Linux or Win operating system stack. Customers are effectively replacing PCs in portable ultrasound systems as they go portable with the SOC solution. Since the OMAP requires only three-quarters of a watt and has all the peripherals integrated, it can provide a low cost, low power solution. The C6455 is one of TI’s high performance VLIW single core DSPs that runs at up to 1.2 GHz. It has 2 Mb of L2 cache, a DDR2 memory interface, as well as external high performance interface support. The OMAP3530 includes a 600 MHz ARM Cortex-A8 processor, alongside a 430 MHz C64x+ DSP core. It supports low power DDR memory interface and has a rich set of peripherals on chip, including USB and a very rich display subsystem and graphics coprocessor. The faster ARM processor enables a less than five second Linux boot and drives the fast time to image, which is important for portable ultrasound type applications. The I/O breakdowns that are shown are just a key assumption to drive the required bandwidth from the front end processing block to the DSP. In this case, the front end block requires 41 Mb/s across the interface and the TI parts can support up to 50 Mb/s, between the DSP and the SOC the connection needs 15.7 Mb/s and TI can support up to 20 Mb/s.