K20P144M120SF3_1210 Datasheet, PDF (13/86 Pages) Freescale Semiconductor, Inc – K20 Sub-Family

Table 1. Voltage and current operating requirements (continued)
Symbol
V_IH
V_IL
V_HYS
I_ICDIO
I_ICAIO
I_ICcont
Description
Input high voltage (digital pins)
• 2.7 V ≤ V_DD ≤ 3.6 V
• 1.7 V ≤ V_DD ≤ 2.7 V
Input low voltage (digital pins)
• 2.7 V ≤ V_DD ≤ 3.6 V
• 1.7 V ≤ V_DD ≤ 2.7 V
Input hysteresis (digital pins)
Digital pin negative DC injection current — single pin
• V_IN < V_SS-0.3V
Analog², EXTAL0/XTAL0, and EXTAL1/XTAL1 pin DC
injection current — single pin
• V_IN < V_SS-0.3V (Negative current injection)
• V_IN > V_DD+0.3V (Positive current injection)
Contiguous pin DC injection current —regional limit,
includes sum of negative injection currents or sum of
positive injection currents of 16 contiguous pins
• Negative current injection
• Positive current injection
Min.
0.7 × V_DD
0.75 × V_DD
—
—
0.06 × V_DD
-5
-5
—
-25
—
Max.
—
—
0.35 × V_DD
0.3 × V_DD
—
—
—
+5
—
+25
Unit
V
V
V
V
V
mA
mA
mA
V_RAM V_DD voltage required to retain RAM
1.2
—
V
V_RFVBAT V_BAT voltage required to retain the VBAT register file
V_{POR_VBAT}
—
V
General
Notes
1
3
1. All 5 V tolerant digital I/O pins are internally clamped to V_SS through a ESD protection diode. There is no diode connection
to V_DD. If V_IN greater than V_{DIO_MIN} (=V_SS-0.3V) is observed, then there is no need to provide current limiting resistors at
the pads. If this limit cannot be observed then a current limiting resistor is required. The negative DC injection current
limiting resistor is calculated as R=(V_{DIO_MIN}-V_IN)/|I_IC|.
2. Analog pins are defined as pins that do not have an associated general purpose I/O port function.
3. All analog pins are internally clamped to V_SS and V_DD through ESD protection diodes. If V_IN is greater than V_{AIO_MIN}
(=V_SS-0.3V) and V_IN is less than V_{AIO_MAX}(=V_DD+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=(V_{AIO_MIN}-V_IN)/|I_IC|. The positive injection current limiting resistor is
calculated as R=(V_IN-V_{AIO_MAX})/|I_IC|. Select the larger of these two calculated resistances.
5.2.2 LVD and POR operating requirements
Table 2. LVD and POR operating requirements
Symbol
V_POR
V_LVDH
Description
Falling VDD POR detect voltage
Falling low-voltage detect threshold — high
range (LVDV=01)
Min.
0.8
2.48
Typ.
1.1
2.56
Max.
1.5
2.64
Table continues on the next page...
Unit
Notes
V
V
K20 Sub-Family Data Sheet, Rev. 4, 10/2012.
Freescale Semiconductor, Inc.
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