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DSC2133 датащи(PDF) 6 Page - Microchip Technology |
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DSC2133 датащи(HTML) 6 Page - Microchip Technology |
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6 / 16 page ![]() DSC2133/DSC2233 DS20006231A-page 6 2022 Microchip Technology Inc. and its subsidiaries 4.0 OPERATIONAL DESCRIPTION The DSC2133/DSC2233 are dual LVDS oscillators consisting of a MEMS resonator and a support PLL IC. The outputs are generated through independent 8-bit programmable dividers from the output of the internal PLL. DSC2133/DSC2233 allow for easy programming of the output frequencies using I2C/SPI interface. Upon power-up, the initial output frequencies are controlled by an internal pre-programmed memory (OTP). This memory stores all coefficients required by the PLL for two different default frequency pairs. The control pin (FS) selects the initial pair. Once the device is powered up, a new output frequency pair can be programmed. Programming details are provided in the Programming Guide. Standard default frequency pairs are described in the following sections. Microchip supports customer defined versions of the DSC2133/DSC2233. When Enable (pin 1) is floated or connected to VDD, the DSC2133/2233 is in operational mode. Driving Enable to ground will tri-state both output drivers (high-impedance mode). |
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