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MCF51QM32VHS Datasheet(PDF) 10 Page - Freescale Semiconductor, Inc |
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MCF51QM32VHS Datasheet(HTML) 10 Page - Freescale Semiconductor, Inc |
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10 / 69 page  Nonswitching electrical specifications 5.2.1 Voltage and Current Operating Requirements Table 1. Voltage and current operating requirements Symbol Description Min. Max. Unit Notes VDD Supply voltage 1.71 3.6 V VDDA Analog supply voltage 1.71 3.6 V VDD – VDDA VDD-to-VDDA differential voltage –0.1 0.1 V VSS – VSSA VSS-to-VSSA differential voltage –0.1 0.1 V VIH Input high voltage • 2.7 V ≤ VDD ≤ 3.6 V • 1.7 V ≤ VDD ≤ 2.7 V 0.7 × VDD 0.75 × VDD — — V V 1 VIL Input low voltage • 2.7 V ≤ VDD ≤ 3.6 V • 1.7 V ≤ VDD ≤ 2.7 V — — 0.35 × VDD 0.3 × VDD V V 2 IIC DC injection current — single pin • VIN > VDD • VIN < VSS 0 0 2 –0.2 mA mA 3 DC injection current — total MCU limit, includes sum of all stressed pins • VIN > VDD • VIN < VSS 0 0 25 –5 mA mA 3 VRAM VDD voltage required to retain RAM 1.2 — V 1. The device always interprets an input as a 1 when the input is greater than or equal to VIH (min.) and less than or equal to VIH (max.), regardless of whether input hysteresis is turned on. 2. The device always interprets an input as a 0 when the input is less than or equal to VIL (max.) and greater than or equal to VIL (min.), regardless of whether input hysteresis is turned on. 3. All functional non-supply pins are internally clamped to VSS and VDD. Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate resistance values for positive and negative clamp voltages, then use the larger of the two values. Power supply must maintain regulation within operating VDD range during instantaneous and operating maximum current conditions. If positive injection current (VIn > VDD) is greater than IDD, the injection current may flow out of VDD and could result in external power supply going out of regulation. Ensure external VDD load will shunt current greater than maximum injection current. This will be the greatest risk when the MCU is not consuming power. Examples are: if no system clock is present, or if clock rate is very low (which would reduce overall power consumption). 5.2 Nonswitching electrical specifications MCF51QM128 Advance Information Data Sheet, Rev. 2, 05/2011. 10 Preliminary Freescale Semiconductor, Inc. |
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