K20P144M100SF2 Datasheet, PDF (13/67 Pages) Freescale Semiconductor, Inc – K20 Sub-Family Data Sheet

Symbol
I_IC
Table 1. Voltage and current operating requirements (continued)
Description
DC injection current — single pin
• V_IN > V_DD
• V_IN < V_SS
Min.
Max.
Unit
0
2
mA
0
–0.2
mA
General
Notes
1
DC injection current — total MCU limit, includes sum
1
of all stressed pins
• V_IN > V_DD
0
25
mA
• V_IN < V_SS
0
–5
mA
1. 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
y ^{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
r ^{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
a ^{power consumption).}
5.1.2 LVD and POR operating requirementsⁱⁿ _{Table 2. LVD and POR operating requirements}
Symbol
lim ^VPOR
V_LVDH
e _VLVW1
r _VLVW2
V_LVW3
P _VLVW4
Description
Falling VDD POR detect voltage
Falling low-voltage detect threshold — high
range (LVDV=01)
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)
Min.
TBD
TBD
TBD
TBD
TBD
TBD
Typ.
1.1
2.56
2.70
2.80
2.90
3.00
Max.
TBD
TBD
TBD
TBD
TBD
TBD
Unit
Notes
V
V
1
V
V
V
V
V_HYS Low-voltage inhibit reset/recover hysteresis —
60
mV
high range
V_LVDL Falling low-voltage detect threshold — low range TBD
TBD
TBD
V
(LVDV=00)
Low-voltage warning thresholds — low range
1
V_LVW1
V_LVW2
V_LVW3
V_LVW4
• Level 1 falling (LVWV=00)
• Level 2 falling (LVWV=01)
• Level 3 falling (LVWV=10)
• Level 4 falling (LVWV=11)
TBD
1.80
TBD
V
TBD
1.90
TBD
V
TBD
2.00
TBD
V
TBD
2.10
TBD
V
Table continues on the next page...
K20 Sub-Family Data Sheet Data Sheet, Rev. 1, 11/2010.
Freescale Semiconductor, Inc.
Preliminary
13