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MAX3000A_06 Datasheet(数据表) 39 Page - Altera Corporation |
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MAX3000A Datasheet(HTML) 39 Page - Altera Corporation |
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39 page 
Altera Corporation 39 MAX 3000A Programmable Logic Device Family Data Sheet Power Consumption Supply power (P) versus frequency (fMAX, in MHz) for MAX 3000A devices is calculated with the following equation: P = PINT + PIO = ICCINT × VCC + PIO The PIO value, which depends on the device output load characteristics and switching frequency, can be calculated using the guidelines given in Application Note 74 (Evaluating Power for Altera Devices). The ICCINT value depends on the switching frequency and the application logic. The ICCINT value is calculated with the following equation: ICCINT = (A × MCTON) + [B × (MCDEV – MCTON)] + (C × MCUSED × fMAX × togLC) The parameters in the ICCINT equation are: MCTON = Number of macrocells with the Turbo BitTM option turned on, as reported in the Quartus II or MAX+PLUS II Report File (.rpt) MCDEV = Number of macrocells in the device MCUSED = Total number of macrocells in the design, as reported in the RPT File fMAX = Highest clock frequency to the device togLC = Average percentage of logic cells toggling at each clock (typically 12.5%) A, B, C = Constants (shown in Table 26) The ICCINT calculation provides an ICC estimate based on typical conditions using a pattern of a 16–bit, loadable, enabled, up/down counter in each LAB with no output load. Actual ICC should be verified during operation because this measurement is sensitive to the actual pattern in the device and the environmental operating conditions. Figures 12 and 13 show the typical supply current versus frequency for MAX 3000A devices. Table 26. MAX 3000A ICC Equation Constants Device ABC EPM3032A 0.71 0.30 0.014 EPM3064A 0.71 0.30 0.014 EPM3128A 0.71 0.30 0.014 EPM3256A 0.71 0.30 0.014 EPM3512A 0.71 0.30 0.014 |
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