The SiT3521 is an ultra-low jitter, user programmable oscillator which offers the system designer great flexibility and functionality. The device supports two in-system programming options after powering up at a default, factory programmed startup frequency:
- 任何频率模式都可以将时钟输出重新编程到1 Hz步骤中的1 MHz和340 MHz之间的任何频率
- 数字控制振荡器（DCO）模式，可以通过5至94个PPT（每万亿分别）分辨率来转向或拉动时钟输出的振荡器（DCO）模式。
The device’s default start-up frequency is specified in the ordering code. User programming of the device is achieved via I2C or SPI. Up to 16 I2C addresses can be specified by the user either as a factory programmable option or via hardware pins, enabling the device to share the I2C with other I2C devices.
