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数据搜索系统，热门电子元器件搜索 |
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AFS090 数据表(PDF) 147 Page - Microsemi Corporation |
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AFS090 数据表(HTML) 147 Page - Microsemi Corporation |
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147 / 334 page  Fusion Family of Mixed Signal FPGAs R e visio n 2 2 - 131 Analog Quad ACM Description Table 2-56 maps out the ACM space associated with configuration of the Analog Quads within the Analog Block. Table 2-56 shows the byte assignment within each quad and the function of each bit within each byte. Subsequent tables will explain each bit setting and how it corresponds to a particular configuration. After 3.3 V and 1.5 V are applied to Fusion, Analog Quad configuration registers are loaded with default settings until the initialization and configuration state machine changes them to user- defined settings. Table 2-56 • Analog Quad ACM Byte Assignment Byte Bit Signal (Bx) Function Default Setting Byte 0 (AV) 0 B0[0] Scaling factor control – prescaler Highest voltage range 1 B0[1] 2 B0[2] 3 B0[3] Analog MUX select Prescaler 4 B0[4] Current monitor switch Off 5 B0[5] Direct analog input switch Off 6 B0[6] Selects V-pad polarity Positive 7 B0[7] Prescaler op amp mode Power-down Byte 1 (AC) 0 B1[0] Scaling factor control – prescaler Highest voltage range 1 B1[1] 2 B1[2] 3 B1[3] Analog MUX select Prescaler 4 B1[4] 5 B1[5] Direct analog input switch Off 6 B1[6] Selects C-pad polarity Positive 7 B1[7] Prescaler op amp mode Power-down Byte 2 (AG) 0 B2[0] Internal chip temperature monitor * Off 1 B2[1] Spare – 2 B2[2] Current drive control Lowest current 3 B2[3] 4 B2[4] Spare – 5 B2[5] Spare – 6 B2[6] Selects G-pad polarity Positive 7 B2[7] Selects low/high drive Low drive Byte 3 (AT) 0 B3[0] Scaling factor control – prescaler Highest voltage range 1 B3[1] 2 B3[2] 3 B3[3] Analog MUX select Prescaler 4 B3[4] 5 B3[5] Direct analog input switch Off 6 B3[6] – – 7 B3[7] Prescaler op amp mode Power-down Note: *For the internal temperature monitor to function, Bit 0 of Byte 2 for all 10 Quads must be set. |
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