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ADE3100 数据表(PDF) 17 Page - STMicroelectronics |
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ADE3100 数据表(HTML) 17 Page - STMicroelectronics |
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17 / 88 page ![]() 17/88 ADE3XXX FM Frequency Synthesizer 2.2 FM Frequency Synthesizer The FM frequency synthesizer creates a clock equivalent to up to eight times the crystal input clock, using a digital frequency synthesizer. The modulation period and amplitude are directly controlled by I2C registers. The I2C interface runs in the LLK_CTRL clock domain, which must be active for access. The output frequency (fOUT) is related to the 32-bit PHASE_RATE and crystal frequency (fXCLK) as follows: fOUT = fXCLK x 2 27+NDIV / PHASE_RATE GLBL_CLK_SRC_SEL_3 0x0012 [7] Reserved R/W [6:4] 0x4 YUV clock source 0x0: YUVCLK pin 0x1: SCLK freq synth 0x2: YUVCLK pin (normal) 0x3: CLKIN pin 0x4: crystal clock 0x5: 0 0x6 - 0x7: Reserved [3] Reserved R/W [2:0] 0x4 DVI detection clock source 0x0: YUVCLK pin 0x1: SCLK freq synth 0x2: DVI detect clock (normal) 0x3: CLKIN pin 0x4: crystal clock 0x5: 0 0x6 - 0x7: Reserved GLBL_IK_SRST 0x0020 R/W [7] 0x0 HDCP block reset synchronous to INCLK R/W [6] 0x0 DFT block reset synchronous to INCLK R/W [5] 0x0 ADC block reset synchronous to INCLK R/W [4] 0x0 SCALER block reset synchronous to INCLK R/W [3] 0x0 YUV block reset synchronous to INCLK R/W [2] 0x0 DVI block reset synchronous to INCLK R/W [1] 0x0 DMEAS block reset synchronous to INCLK R/W [0] 0x0 SMUX block reset synchronous to INCLK GLBL_DK_SRST 0x0040 [7] 0x0 Reserved R/W [6] 0x0 PGEN block reset synchronous to DOTCLK R/W [5] 0x0 OMUX block reset synchronous to DOTCLK R/W [4] 0x0 APC block reset synchronous to DOTCLK R/W [3] 0x0 OSD block reset synchronous to DOTCLK R/W [2] 0x0 GAMMA block reset synchronous to DOTCLK R/W [1] 0x0 OSQ block reset synchronous to DOTCLK R/W [0] 0x0 SCALE block reset synchronous to DOTCLK Table 4: Global Registers (Sheet 4 of 4) Register Name Addr. Mode Bits Default Description |
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