PXN20 Datasheet, PDF (36/60 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Electrical characteristics
4.8 Low voltage characteristics
Table 14. Low voltage monitors
Spec
Characteristic
1 Power-on-Reset Assert Level¹
2 Low Voltage Monitor 3.3 V²
Assert Level
De-assert Level
3 Low Voltage Monitor Synthesizer³
Assert Level
De-assert Level
4 Low Voltage Monitor 3.0 V Low Threshold¹
VRCSEL = V_SSA
Assert Level
De-assert Level
VRCSEL = V_DDA
Assert Level
De-assert Level
5 Low Voltage Monitor 5.0 V^{1, 4}
Assert Level
De-assert Level
6 Low Voltage Monitor 5.0 V High Threshold^{1, 5}
Assert Level
De-assert Level
1 _{Monitors VDDA.}
2 _{Monitors VDD33.}
3 _{Monitors VDDSYN.}
4 _{Disabled when VRCSEL = VSSA.}
Symbol
V_POR
V_LVI33A
V_LVI33D
V_LVISYNA
V_LVISYND
V_{LVI_VDDA_LOA}
V_{LVI_VDDA_LOD}
V_{LVI_VDDA_LOA}
V_{LVI_VDDA_LOD}
V_{LVI_VDDA_A}
V_{LVI_VDDA_D}
V_{LVI_VDDA_HA}
V_{LVI_VDDA_HD}
Min
1.5
3.00
3.04
3.00
3.04
3.00
3.04
3.25
3.35
4.35
4.45
4.50
4.50
Typical
—
3.05
3.12
3.05
3.12
3.05
3.12
3.35
3.45
4.475
4.575
4.675
4.675
Max
2.8
3.10
3.19
3.10
3.19
3.10
3.19
3.48
3.55
4.55
4.65
4.80
4.80
4.9 Oscillators electrical characteristics
Table 15. 3.3 V high frequency external oscillator
Spec
1
2
3
4
5
6
7
Characteristic
Frequency Range
Duty Cycle of reference
EXTAL Input High Voltage
External crystal mode²
External clock mode
EXTAL Input Low Voltage
External crystal mode³
External clock mode
XTAL Current⁴
Total On-chip stray capacitance on XTAL
Total On-chip stray capacitance on EXTAL
Symbol
f_ref
t_DC
V_IHEXT
V_ILEXT
I_XTAL
C_{S_XTAL}
C_{S_EXTAL}
Min
4¹
40
V_XTAL + 0.4
0.65  V_DDSYN
V_DDSYN – 0.3
V_DDSYN – 0.3
1
—
—
Max
40
60
V_DDSYN + 0.3
V_DDSYN + 0.3
V_XTAL – 0.4
0.35  V_DDSYN
3
3
3
Unit
V
V
V
V
V
V
Unit
MHz
%
V
V
mA
pF
pF
PXN20 Microcontroller Data Sheet, Rev. 1
36
Freescale Semiconductor