Cypress provides a recommended PCB layout guide in their application note AN214445, which includes guidelines for signal routing, power supply decoupling, and ground plane design to ensure optimal performance and minimize EMI.
A reliable reset circuit can be implemented using a voltage supervisor IC, such as the CY1147, which can detect power-on reset, brown-out reset, and watchdog timer reset. The reset circuit should be designed to ensure a clean reset signal to the CYRS1544AV18-250GCMB during power-up and power-down sequences.
Although the datasheet specifies an operating temperature range of -40°C to 85°C, Cypress recommends derating the device's performance at extreme temperatures. For reliable operation, it's recommended to operate the device within a temperature range of 0°C to 70°C.
To troubleshoot issues with the crystal oscillator, check the crystal resonator's specifications, ensure proper PCB layout and routing, and verify the oscillator's startup time and frequency. Additionally, use Cypress's Crystal Oscillator Calculator tool to ensure the correct crystal resonator selection and configuration.
Cypress recommends using a combination of ceramic and electrolytic capacitors for power supply decoupling. A 10uF ceramic capacitor and a 22uF electrolytic capacitor in parallel can provide effective decoupling and noise filtering for the device's power supply pins.
