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AD9927BBCZ датащи(PDF) 25 Page - Analog Devices |
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AD9927BBCZ датащи(HTML) 25 Page - Analog Devices |
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25 / 100 page ![]() AD9927 Rev. 0 | Page 25 of 100 HBLK H-CLOCK FREQUENCY CAN BE REDUCED DURING HBLK BY 1/2 (AS SHOWN), 1/4, 1/6, 1/8, 1/10, 1/12, AND SO ON, UP TO 1/30 USING HBLKWIDTH REGISTER H1/H3 H2/H4 1/FPIX 2× (1/FPIX) Figure 29. Generating Wide H-Clock Pulses During HBLK Interval H1 H2 HBLKSTART A HBLKEND REPEAT AREA 0 HD B C REPEAT AREA 1 REPEAT AREA 2 REPEAT AREA 3 REPEAT AREA 4 REPEAT AREA 5 MASK A, B, C PULSES IN ANY REPEAT AREA BY SETTING RA*H*REP* = 0 CHANGE NUMBER OF A, B, C PULSES IN ANY REPEAT AREA USING RA*H*REP* REGISTERS CREATE UP TO 3 GROUPS OF TOGGLES A, B, C COMMON IN ALL REPEAT AREAS Figure 30. HBLK Mode 2 Operation HBLK H1 H2 HBLKSTART HBLKSTARTA HBLKEND HBLKLEN REPEAT AREA 0 HBLKREP = 2 TO CREATE TWO REPEAT AREAS HD REPEAT AREA 1 HBLKSTARTB HBLKSTARTC RA0H1REPA RA0H1REPB RA0H1REPC ALL RA*H*REPA/B/C REGISTERS = 2 TO CREATE TWO HCLK PULSES RA1H1REPA RA1H1REPB RA1H1REPC RA0H2REPA RA0H2REPB RA0H2REPC RA1H2REPA RA1H2REPB RA1H2REPC Figure 31. HBLK Mode 2 Registers |
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