Freescale Semiconductor *KE02 Series, Technical Data Manual

3. The specified resistor value is the actual value internal to the device. The pullup value may appear higher when measured

externally on the pin.

4. All functional non-supply pins, except for PTA2 and PTA3, are internally clamped to V

SS

 and V

DD

. PTA2 and PTA3 are true

open drain I/O pins that are internally clamped to V

SS

.

5. 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 value.

6. Power supply must maintain regulation within operating V

DD

 range during instantaneous and operating maximum current

conditions. If the positive injection current (V

In

 > V

DD

) is higher than I

DD

, the injection current may flow out of V

DD

 and could

result in external power supply going out of regulation. Ensure that external V

DD

 load will shunt current higher than

maximum injection current when the MCU is not consuming power, such as when no system clock is present, or clock rate
is very low (which would reduce overall power consumption).

Table 4. LVD and POR specification

Symbol

C

Description

Min

Typ

Max

Unit

V

POR

D

POR re-arm voltage

1

1.5

1.75

2.0

V

V

LVDH

C

Falling low-voltage detect

threshold—high range (LVDV

= 1)

2

4.2

4.3

4.4

V

V

LVW1H

C

Falling low-

voltage

warning

threshold—

high range

Level 1 falling

(LVWV = 00)

4.3

4.4

4.5

V

V

LVW2H

C

Level 2 falling

(LVWV = 01)

4.5

4.5

4.6

V

V

LVW3H

C

Level 3 falling

(LVWV = 10)

4.6

4.6

4.7

V

V

LVW4H

C

Level 4 falling

(LVWV = 11)

4.7

4.7

4.8

V

V

HYSH

C

High range low-voltage

detect/warning hysteresis

—

100

—

mV

V

LVDL

C

Falling low-voltage detect

threshold—low range (LVDV

= 0)

2.56

2.61

2.66

V

V

LVW1L

C

Falling low-

voltage

warning

threshold—

low range

Level 1 falling

(LVWV = 00)

2.62

2.7

2.78

V

V

LVW2L

C

Level 2 falling

(LVWV = 01)

2.72

2.8

2.88

V

V

LVW3L

C

Level 3 falling

(LVWV = 10)

2.82

2.9

2.98

V

V

LVW4L

C

Level 4 falling

(LVWV = 11)

2.92

3.0

3.08

V

V

HYSDL

C

Low range low-voltage detect

hysteresis

—

40

—

mV

V

HYSWL

C

Low range low-voltage

warning hysteresis

—

80

—

mV

V

BG

P

Buffered bandgap output 

3

1.14

1.16

1.18

V

1. Maximum is highest voltage that POR is guaranteed.
2. Rising thresholds are falling thr hysteresis.
3. voltage Factory trimmed at V

DD

 = 5.0 V, Temp = 25 °C

Nonswitching electrical specifications

KE02 Sub-Family Data Sheet, Rev4, 10/2014.

Freescale Semiconductor, Inc.

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