HSMG-C170 - Avago Technologies

HSMG-C170 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and thermal management for optimal performance?
  Broadcom recommends a 4-layer PCB with a solid ground plane, and thermal vias under the device to dissipate heat. A thermal pad on the bottom of the package should be connected to a heat sink or a thermal pad on the PCB.
• How do I ensure signal integrity and minimize EMI emissions?
  Use a 100-ohm differential impedance for high-speed signals, and add series termination resistors to reduce reflections. Also, use a common mode filter or a Pi-filter to reduce EMI emissions.
• What is the recommended power-up sequence and voltage ramp rate?
  Power up the device in the following sequence: VCC, then AVCC, then DVCC. The voltage ramp rate should be 1-2 ms/V to prevent latch-up and ensure reliable operation.
• How do I configure the device for optimal power consumption?
  Use the power management registers to configure the device for low power mode. Disable unused blocks, reduce clock frequencies, and use dynamic voltage and frequency scaling to minimize power consumption.
• What are the recommended settings for the PLL and clocking system?
  Use the PLL to generate a stable clock frequency. Set the PLL loop bandwidth to 100 kHz, and the PLL gain to 10. Use the clocking system to generate a 100 MHz clock frequency for the CPU and peripherals.