K20P104M100SF2 Freescale Semiconductor, K20P104M100SF2 Datasheet - Page 12

• Manufacturer Part Number: K20P104M100SF2
• Description: K20 Sub-Family
• Manufacturer: Freescale Semiconductor

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General
1. All functional non-supply pins are internally clamped to VSS and VDD. Input must be current limited to the value specified.
5.1.2 LVD and POR operating requirements
12
Symbol
Symbol
V
V
V
V
V
V
V
V
V
V
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).
V
V
LVDH
LVW1
LVW2
LVW3
LVW4
LVW1
LVW2
LVW3
LVW4
LVDL
POR
HYS
I
IC
Falling VDD POR detect voltage
Falling low-voltage detect threshold — high
range (LVDV=01)
Low-voltage warning thresholds — high range
Low-voltage inhibit reset/recover hysteresis —
high range
Falling low-voltage detect threshold — low range
(LVDV=00)
Low-voltage warning thresholds — low range
Description
DC injection current — single pin
DC injection current — total MCU limit, includes sum
of all stressed pins
Description
Table 1. Voltage and current operating requirements (continued)
• Level 1 falling (LVWV=00)
• Level 2 falling (LVWV=01)
• Level 3 falling (LVWV=10)
• Level 4 falling (LVWV=11)
• Level 1 falling (LVWV=00)
• Level 2 falling (LVWV=01)
• Level 3 falling (LVWV=10)
• Level 4 falling (LVWV=11)
• V
• V
• V
• V
IN
IN
IN
IN
> V
< V
> V
< V
DD
SS
DD
SS
Table 2. LVD and POR operating requirements
K20 Sub-Family Data Sheet Data Sheet, Rev. 1, 11/2010.
Table continues on the next page...
Preliminary
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
Min.
Min.
0
0
0
0
2.56
2.70
2.80
2.90
3.00
TBD
1.80
1.90
2.00
2.10
Typ.
1.1
60
Max.
–0.2
25
–5
2
Max.
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
Freescale Semiconductor, Inc.
Unit
mA
mA
mA
mA
Unit
mV
V
V
V
V
V
V
V
V
V
V
V
Notes
Notes
1
1
1
1
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