K20P144M120SF3 Datasheet, PDF (13/80 Pages) Freescale Semiconductor, Inc – K20 Sub-Family Data Sheet

Symbol
V_IH
Table 1. Voltage and current operating requirements (continued)
Description
Input high voltage (digital pins)
• 2.7 V ≤ V_DD ≤ 3.6 V
• 1.7 V ≤ V_DD ≤ 2.7 V
Min.
Max.
0.7 × V_DD
—
0.75 × V_DD
—
Unit
V
V
General
Notes
V_IL
Input low voltage (digital pins)
• 2.7 V ≤ V_DD ≤ 3.6 V
• 1.7 V ≤ V_DD ≤ 2.7 V
—
0.35 × V_DD
V
—
0.3 × V_DD
V
V_HYS
Input hysteresis (digital pins)
0.06 × V_DD
—
V
I_ICDIO Digital pin negative DC injection current — single pin
1
• V_IN < V_SS-0.3V
-5
—
mA
I_ICAIO
Analog², EXTAL0/XTAL0, and EXTAL1/XTAL1 pin DC
injection current — single pin
3
mA
• V_IN < V_SS-0.3V (Negative current injection)
-5
—
• V_IN > V_DD+0.3V (Positive current injection)
—
+5
I_ICcont
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
-25
—
mA
• Positive current injection
—
+25
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
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
calcualted 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 Description
V_POR Falling VDD POR detect voltage
Min.
0.8
Typ.
1.1
Max.
1.5
Table continues on the next page...
Unit
Notes
V
K20 Sub-Family Data Sheet Data Sheet, Rev. 3, 2/2012.
Freescale Semiconductor, Inc.
Preliminary
13