Slide 8 of 16
Notes:
Case study #3 focuses on a smaller basestation with a lower channel requirement, smaller size, lower cost, and lower power. In this case, taking the same algorithm (for ease of comparison) that was used in case study #2, it would require four 100 MIPS LC54x devices to implement the required 24 channels. The total processor cost is $132 and the cost per channel is $5.50. The power dissipation (mW per channel) would be 20 mW. This is determined by: 4 x 115 mW = 460 mW. 460 mW / 24 channels is approximately 20 mW per channel. For the C6x, only one 6201 is required (and is not even fully utilized). This produces a processor cost of $96 and $ / channel of $4. The power dissipation is determined by: 3W (or 3000 mW) divided 24 channels = 125 mW / channel. For this application, either choosing the C54x or the C6x is a viable alternative. The C6x has a better cost per channel number ($4 vs. $5.50) while the C54x has a lower power dissipation per channel figure. It depends on what are the most important careabouts for the customers.
