MK50DX128CMB7 datasheet(13/78 Pages) FREESCALE

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3. All analog pins are internally clamped to VSS and VDD through ESD protection diodes. If VIN is greater than VAIO_MIN

(=VSS-0.3V) and VIN is less than VAIO_MAX(=VDD+0.3V) is observed, then there is no need to provide current limiting

resistors at the pads. If these limits cannot be observed then a current limiting resistor is required. The negative DC

injection current limiting resistor is calculated as R=(VAIO_MIN-VIN)/|IIC|. The positive injection current limiting resistor is

calcualted as R=(VIN-VAIO_MAX)/|IIC|. Select the larger of these two calculated resistances.

5.2.2 LVD and POR operating requirements

Table 2. VDD supply LVD and POR operating requirements

Symbol

Description

Min.

Typ.

Max.

Unit

Notes

VPOR

Falling VDD POR detect voltage

0.8

1.1

1.5

VLVDH

Falling low-voltage detect threshold — high

range (LVDV=01)

2.48

2.56

2.64

VLVW1H

VLVW2H

VLVW3H

VLVW4H

Low-voltage warning thresholds — high range

• Level 1 falling (LVWV=00)

• Level 2 falling (LVWV=01)

• Level 3 falling (LVWV=10)

• Level 4 falling (LVWV=11)

2.62

2.72

2.82

2.92

2.70

2.80

2.90

3.00

2.78

2.88

2.98

3.08

VHYSH

Low-voltage inhibit reset/recover hysteresis —

high range

—

±80

—

VLVDL

Falling low-voltage detect threshold — low range

(LVDV=00)

1.54

1.60

1.66

VLVW1L

VLVW2L

VLVW3L

VLVW4L

Low-voltage warning thresholds — low range

• Level 1 falling (LVWV=00)

• Level 2 falling (LVWV=01)

• Level 3 falling (LVWV=10)

• Level 4 falling (LVWV=11)

1.74

1.84

1.94

2.04

1.80

1.90

2.00

2.10

1.86

1.96

2.06

2.16

VHYSL

Low-voltage inhibit reset/recover hysteresis —

low range

—

±60

—

VBG

Bandgap voltage reference

0.97

1.00

1.03

tLPO

Internal low power oscillator period — factory

trimmed

900

1000

1100

μs

1. Rising thresholds are falling threshold + hysteresis voltage

Table 3. VBAT power operating requirements

Symbol

Description

Min.

Typ.

Max.

Unit

Notes

VPOR_VBAT Falling VBAT supply POR detect voltage

0.8

1.1

1.5

General

K50 Sub-Family Data Sheet, Rev. 2, 4/2012.

Freescale Semiconductor, Inc.

MK50DX128CMB7 Datasheet(PDF) 13 Page - Freescale Semiconductor, Inc

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