ASM3P2108AF-08SR

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The ASM3P2108AF-08SR is a clock generator, phase-locked loop (PLL) and frequency synthesizer. It is a fully featured device capable of achieving an extensive range of application requirements in many frequency control ASICs and FPGAs.

The ASM3P2108AF-08SR is able to provide an output frequency based on an input reference clock, ranging from 1 Hz to 50 MHz. The device has an integrated 8-line x 10-bit synchronous SRAM with an LSB of 48 MHz. This SRAM is used for parameter storage, allowing for adjustments or modifications of the output frequency range, providing flexibility to the user. Additionally, a single-wire serial interface is provided for simple programming and control from remote locations.

The ASM3P2108AF-08SR works by first receiving an input reference clock. This reference clock is first divided by two in order to get the Dividend Input Clock (DIC). This DIC is then used to generate a Frequency-Locked Loop (FLL) that is capable of outputting an output frequency across a range of 1 kHz to 50 MHz. The FLL output frequency is used to clock a frequency divider, and the output of the divider is fed back to the FLL. The frequency of the FLL output is thus locked to the frequency of the external reference clock.

The External Triggering Unit (ETU) within the device is used to further configure the ASM3P2108AF-08SR. It allows the user to externally adjust the FLL frequency output and adjust the Phase Lock Loop (PLL) parameters to satisfy specific application requirements. The ETU allows the user to control the Output Fractional Divider (OFD) and the Output Integral Divider (OID) to alter the frequency output.

The PLL module within the device is also capable of providing an additional range of output frequencies. The PLL in the ASM3P2108AF-08SR is also equipped with programmable dividers and multipliers. The dividers can be programmed with integers ranging from 1 to 63 to divide down the reference clock and the multipliers can be set to a range of 1 to 15 to multiply the reference clock. These configured dividers and multipliers are then used to generate an output frequency across the range of 25 kHz to 200 MHz.

In summary, the ASM3P2108AF-08SR is an ideal solution for providing both frequency and phase control for ASICs and FPGAs. The PLL and FLL modules combined with the External Triggering Unit allows for a great degree of flexibility and freedom for the user. The device is also relatively straightforward to configure and program, enabling quick integration and deployment into end applications.

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