Board size: 43*40mm

Supply voltage: +3.3V (input signal can not exceed this value)

Onboard clock: 100MHz

Use: can be used for the clock signal frequency, the lowest frequency input signal frequency can be reduced to 0.001Hz, the maximum output power of up to 50MHz (this does not need extra frequency, frequency function can choose [general] frequency multiplier, point me)

Performance: (1) all digital phase-locked loop frequency, high precision frequency coefficients of 2, 2.5, 3, 3.5, 4, 4.5,... (that is, 2....2147483647... 32 times -1, decimal or integer frequency), the input clock signal duty cycle is not required

(2) 47.6Hz and 0.7Hz fixed frequency square wave signal output (for user test or two processing)

Note: (1) to output frequency clock output signal frequency start in real input signal after fifth cycles due to the internal need for a certain period by the current user algorithm to determine the frequency of the input signal, and then keep track of

(2) frequency accuracy independent of frequency doubling coefficient associated with the frequency doubled output frequency, the output frequency is higher, the corresponding accuracy will decrease (algorithm will be cut off, such as low) 10Hz frequency to 1K accuracy than 10K to 1M frequency to be high, the typical values in the specifications for reference only, the actual use can be. Probably calculated value, and then adjust the low for regulation.

Card verification: the card itself has been used to jump ship cap configuration, power can be used at the same time, the board work instructions LED in the flashing lights, when any plug or unplug a jumper, coefficient of configuration instructions LED lights will immediately turn state, indicating that the user of the pin is set properly; in addition, frequency doubling is the default configuration for 713130.5 times, 0.7Hz fixed output module receiving frequency clock input pin, can output 520KHz frequency square wave clock can be observed by oscilloscope