This application note introduces the hardware development of STR71x product family, including power management, clock management, reset control, boot mode settings and debug management, and provides detailed reference design schematics.
This application note is intended for system designers requiring a hardware implementation overview of the STR71x product family. It describes the minimum hardware resources required to develop an application, covering power supply, clock management, reset control, boot mode settings, and debug management.
| Power Supply Voltage (Vss) | 2.7 to 3.6 V |
|---|---|
| Core Logic Voltage (V18) | 1.8 V |
| Real Time Clock Frequency | 32 kHz |
| Main Clock Input Frequency | up to 16 MHz |
| USB Clock Frequency | 48 MHz |
The chip is powered by an external 3V3 supply with a range of 2.7 to 3.6 V.
The Real Time Clock operates at a speed of 32 kHz and must be provided by an external resonator circuitry.
The clock control unit must be driven by an external oscillator connected to the CK pin at a frequency of up to 16 MHz.