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56855 bảng dữ liệu(PDF) 21 Page - Freescale Semiconductor, Inc |
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56855 bảng dữ liệu(HTML) 21 Page - Freescale Semiconductor, Inc |
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21 / 52 page ![]() Supply Voltage Sequencing and Separation Cautions 56855 Technical Data, Rev. 6 Freescale Semiconductor 21 Figure 4-1 Maximum Run IDDTOTAL vs. Frequency (see Notes 1. and 5. in Table 4-4) 4.3 Supply Voltage Sequencing and Separation Cautions Figure 4-2 shows two situations to avoid in sequencing the VDD and VDDIO, VDDA supplies. 5. Running core and performing external memory access. Clock at 120 MHz. 6. When VDD drops below VEI max value, an interrupt is generated. 7. Power-on reset occurs whenever the digital supply drops below 1.8V. While power is ramping up, this signal remains active for as long as the internal 2.5V is below 1.8V no matter how long the ramp up rate is. The internally regulated voltage is typically 100 mV less than VDD during ramp up until 2.5V is reached, at which time it self-regulates. 0 30 60 120 150 20 40 60 80 100 120 90 EMI Mode5 MAC Mode1 |
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