MCF52235 datasheet(32/54 Pages) FREESCALE

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MCF52235 ColdFire Microcontroller Data Sheet, Rev. 7

Electrical Characteristics

Freescale Semiconductor

2.3

DC Electrical Specifications

Table 22. DC Electrical Specifications 1

1 Refer to Table 25 for additional PLL specifications.

Characteristic

Symbol

Min

Max

Unit

Supply voltage

VDD

3.0

3.6

Input high voltage

VIH

0.7

× V

4.0

Input low voltage

VIL

VSS – 0.3

0.35 x VDD

Input hysteresis

VHYS

0.06

× V

—mV

Low-voltage detect trip voltage (VDD falling)

VLVD

2.15

2.3

Low-voltage detect hysteresis (VDD rising)

VLVDHYS

120

Input leakage current

Vin = VDD or VSS, input-only pins

Iin

–1.0

1.0

μA

High impedance (off-state) leakage current

Vin = VDD or VSS, all input/output and output pins

IOZ

–1.0

1.0

μA

Output high voltage (all input/output and all output pins)

IOH = –2.0 mA

VOH

VDD - 0.5

Output low voltage (all input/output and all output pins)

IOL = 2.0 mA

VOL

0.5

Weak internal pull-up device current, tested at VIL max.

2 Refer to Table 3 for pins with internal pull-up devices.

IAPU

–10

–130

μA

Input capacitance 3

All input-only pins

All input/output (three-state) pins

3 This parameter is characterized before qualification rather than 100% tested.

Cin

—

Load capacitance4

Low drive strength

High drive strength

4 pF load ratings are based on DC loading and are provided as an indication of driver strength. High speed interfaces

require transmission line analysis to determine proper drive strength and termination.

DC injection current 3, 5, 6, 7

VNEGCLAMP =VSS– 0.3 V, VPOSCLAMP = VDD + 0.3

Single pin limit

Total MCU limit, Includes sum of all stressed pins

5 All functional non-supply pins are internally clamped to V

SS and their respective VDD.

6 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.

7 The power supply must maintain regulation within operating V

DD 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 that the external VDD load shunts current

greater than maximum injection current. This is 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. Also, the system

clock is not present during the power-up sequence until the PLL has attained lock.

IIC

–1.0

–10

1.0

MCF52235 Datasheet(PDF) 32 Page - Freescale Semiconductor, Inc

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