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AD9953ASV датащи(PDF) 19 Page - Analog Devices

номер детали AD9953ASV
подробное описание детали  400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer
PDF  42 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD9953ASV датащи(HTML) 19 Page - Analog Devices

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PRELIMINARY TECHNICAL DATA
AD9953
When CFR1<14> = 1, this bit automatically synchronously clears (loads zeros into)
the frequency accumulator for one cycle upon reception of the I/O UPDATE
sequence indicator.
CFR1<13>: AutoClear Phase Accumulator bit.
When CFR1<13> = 0 (default), a new frequency tuning word is applied to the inputs
of the phase accumulator, but not loaded into the accumulator.
When CFR1<13> = 1, this bit automatically synchronously clears (loads zeros into)
the phase accumulator for one cycle upon reception of the I/O UPDATE sequence
indicator.
CFR1<12>: Sine/Cosine select bit.
When CFR1<12> = 0 (default), the angle-to-amplitude conversion logic employs a
COSINE function.
When CFR1<12> = 1, the angle-to-amplitude conversion logic employs a SINE
function.
CFR1<11>: Clear Frequency Accumulator.
When CFR1<11> = 0 (default), the frequency accumulator functions as normal.
When CFR1<11> = 1, the frequency accumulator memory elements are
asynchronously cleared.
CFR1<10>: Clear Phase Accumulator.
When CFR1<10> = 0 (default), the phase accumulator functions as normal.
When CFR1<10> = 1, the phase accumulator memory elements are asynchronously
cleared.
CFR1<9>: SDIO Input Only.
When CFR1<9> = 0 (default), the SDIO pin has bi-directional operation (2-wire
serial programming mode).
REV. PrB 1/30/03
Page 19
Analog Devices, Inc.



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