MCF51QH128 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'MCF51QH128' PDF : 68 Pages View PDF
Clock modules
Table 15. Oscillator DC electrical specifications (continued)
Symbol
RF
RS
Description
Feedback resistor — low-frequency, low-power
mode (HGO=0)
Feedback resistor — low-frequency, high-gain
mode (HGO=1)
Feedback resistor — high-frequency, low-power
mode (HGO=0)
Feedback resistor — high-frequency, high-gain
mode (HGO=1)
Series resistor — low-frequency, low-power
mode (HGO=0)
Series resistor — low-frequency, high-gain mode
(HGO=1)
Series resistor — high-frequency, low-power
mode (HGO=0)
Series resistor — high-frequency, high-gain
mode (HGO=1)
• 1 MHz resonator
• 2 MHz resonator
• 4 MHz resonator
• 8 MHz resonator
• 16 MHz resonator
• 20 MHz resonator
• 32 MHz resonator
Vpp5 Peak-to-peak amplitude of oscillation (oscillator
mode) — low-frequency, low-power mode
(HGO=0)
Peak-to-peak amplitude of oscillation (oscillator
mode) — low-frequency, high-gain mode
(HGO=1)
Peak-to-peak amplitude of oscillation (oscillator
mode) — high-frequency, low-power mode
(HGO=0)
Peak-to-peak amplitude of oscillation (oscillator
mode) — high-frequency, high-gain mode
(HGO=1)
Min.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Typ.
—
10
—
1
—
200
—
6.6
3.3
0
0
0
0
0
0.6
VDD
0.6
VDD
Max.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
Notes
MΩ
2, 4
MΩ
MΩ
MΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
V
V
V
V
1. VDD=3.3 V, Temperature =25 °C
2. See crystal or resonator manufacturer's recommendation
3. Cx,Cy can be provided by using either the integrated capacitors or by using external components.
4. When low power mode is selected, RF is integrated and must not be attached externally.
5. The EXTAL and XTAL pins should only be connected to required oscillator components and must not be connected to any
other devices.
MCF51QH128 Advance Information Data Sheet, Rev. 0, 05/2011.
Freescale Semiconductor, Inc.
Preliminary
25
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