PXS20 Datasheet, PDF (86/119 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Electrical characteristics
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Table 20. Main oscillator electrical characteristics
Symbol
Parameter
Conditions¹
Value
Unit
Min
Typ
Max
f_XOSCHS SR Oscillator frequency
—
4.0
g_mXOSCHS P Oscillator
V_DD = 3.3 V ±10%
4.5
transconductance
V_XOSCHS D Oscillation amplitude f_OSC = 4, 8, 10, 12, 16 MHz
1.3
f_OSC = 40 MHz
1.1
V_XOSCHSOP D Oscillation operating
—
—
point
I_XOSCHS D Oscillator consumption
T_XOSCHSSU T Oscillator start-up time
V_IH
SR Input high level CMOS
Schmitt Trigger
—
f_OSC = 4, 8, 10, 12 MHz²
f_OSC = 16, 40 MHz²
Oscillator bypass mode
—
—
—
0.65 × V_DD
V_IL
SR Input low level CMOS Oscillator bypass mode
–0.4
Schmitt Trigger
1 _{VDD = 3.3 V ±10%, TJ = –40 to +150 °C, unless otherwise specified.}
2 _{The recommended configuration for maximizing the oscillator margin are:}
XOSC_MARGIN = 0 for 4 MHz quartz
XOSC_MARGIN = 1 for 8/16/40 MHz quartz
—
—
—
—
0.82
—
—
—
—
—
40.0
13.25
MHz
mA/V
—
V
—
—
V
3.5
mA
6
ms
2
V_DD + 0.4 V
0.35 × V_DD V
3.13 FMPLL electrical characteristics
Table 21. FMPLL electrical characteristics
Symbol
Parameter
Conditions
Min
f_{REF_CRYSTAL} D FMPLL reference frequency
Crystal reference
4
f_{REF_EXT}
range¹
f_{PLL_IN} D Phase detector input frequency
—
4
range (after pre-divider)
f_FMPLLOUT D Clock frequency range in normal
—
4
mode
f_FREE P Free running frequency
Measured using clock division
20
(typically 16)
f_sys
D On-chip FMPLL frequency²
—
16
t_CYC D System clock period
—
—
f_LORL D Loss of reference frequency
Lower limit
1.6
f_LORH
window³
Upper limit
24
f_SCM D Self-clocked mode frequency^4,5
—
20
t_LOCK P Lock time
Stable oscillator (f_PLLIN = 4 MHz), —
stable V_DD
Typ Max Unit
—
40 MHz
—
16 MHz
— 120² MHz
— 150 MHz
— 120 MHz
— 1 / f_sys ns
— 3.7 MHz
—
56
— TBD MHz
— 200 µs
PXS20 Microcontroller Data Sheet, Rev. 1
86
Freescale Semiconductor
Preliminary—Subject to Change Without Notice