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ICS307G-03 Datasheet(PDF) 9 Page - Integrated Circuit Systems |
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ICS307G-03 Datasheet(HTML) 9 Page - Integrated Circuit Systems |
9 / 12 page SERIALLY PROGRAMMABLE CLOCK SOURCE MDS 307-03 C 9 Revision 101705 In te gr ated Circuit Systems ● 525 Ra ce Street, San Jose, CA 9512 6 ● tel (4 08) 297 -1 201 ● www.icst.com ICS307-03 Programming Interface The dynamic register within the ICS307-03 controls the entire device and may be reprogrammed any time after power is properly applied. If V or R values are changed, the frequency will transition smoothly to the new value without glitches or short cycles. However, changing any divider or mux in the output signal path may generate a glitch. The register is 132 bits in length and accepts the MSB first. The SCLK signal latches the current data bit value in the rising edge of It latches the most recently shifted 132 bit values into the control register of device whenever CS is high. Care must be taken to ensure that CS is always low until the system is ready to load in a new register value and that SCLK is never toggled high when CS is high. The register can be programmed any time after power is applied, even while in power-down (pin 15 or bit 112 held low) with the waveform and timing shown below:. Figure 2: ICS307-03 Programming Timing Diagram Table 8: AC Parameters for Programming the ICS307-03 Programming with VersaClock Software The VersaClock II Software not only generates the programming word for the user, it can also be used to program the device via the host computer’s parallel port. Demonstration boards are available from ICS that allows the VersaClock II S/W to directly connect the ICS307-03 to a Windows based PC’s DB-25 parallel port connector and programmed simply by pressing the “Program Part” button. Contact ics-mk@icst.com for more details. Parameter Condition Min. Max. Units tSETUP Setup time 2.5 ns tHOLD Hold time after SCLK 2.5 ns tW Data wait time 2.5 ns tS Strobe pulse width 10 ns SCLK Frequency 200 MHz 128 129 130 131 10 t hold t setup 2 SCLK CS t s t w DIN |
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