特性
- Packaged as 16-pin TSSOP – Pb-free, RoHS compliant
- Eight addressable registers
- Replaces multiple crystals and oscillators
- Output frequencies up to 200 MHz at 3.3 V
- Input crystal frequency of 5 to 27 MHz
- Up to three reference outputs
- Operating voltages of 3.3 V
- VDDO output control from 1.8 V to 3.3 V
- Controllable output drive levels
- Advanced, low-power CMOS process
描述
The 276 field programmable VCXO clock synthesizer generates up to three high-quality, high-frequency clock outputs including multiple reference clocks from a low-frequency crystal input. It is designed to replace crystals and crystal oscillators in most electronic systems. Using IDT's VersaClockTM software to configure PLLs and outputs, the 276 contains a One-Time Programmable (OTP) ROM for field programmability. Programming features include VCXO and eight selectable configuration registers. Each of the outputs are powered by a single VDDO voltage. VDDO may vary from 1.8 V to VDD. Using Phase-Locked Loop (PLL) techniques, the device runs from a standard fundamental mode, inexpensive crystal, or clock. It can replace VCXOs, multiple crystals and oscillators, saving board space and cost. The 276 is also available in factory programmed custom versions for high-volume applications.
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关于写Notify使能问题
你好. 我这边在看bass_task.c源码时, 发现他gattc_write_cmd_ind_handler函数里要去操作notify的东西. (BAS_IDX_BATT_LVL_NTF_CFG) 这个使能Notify是由手机端传来 ...
2016年6月17日
