MC68HC908GZ16 Datasheet, PDF (295/314 Pages) Motorola, Inc – Microcontrollers

Clock Generation Module Characteristics
21.9 Clock Generation Module Characteristics
21.9.1 CGM Component Specifications
Characteristic
Crystal frequency
Crystal load capacitance⁽¹⁾
Crystal fixed capacitance
Crystal tuning capacitance
Feedback bias resistor
1. Consult crystal manufacturer’s data.
Symbol
f_XCLK
C_L
C₁
C₂
R_B
Min
Typ
Max
1
4
8
—
—
—
—
(2 x C_L) –5
—
—
(2 x C_L) –5
—
1
10
20
21.9.2 CGM Electrical Specifications
Characteristic
Symbol
Min
Typ
Max
Reference frequency (for PLL operation)
Range nominal multiplier
Programmed VCO center-of-range frequency⁽¹⁾
f_RCLK
f_NOM
f_VRS
1
4
8
—
71.42
—
—
(Lx2^E)f_NOM
—
1. See 4.3.6 Programming the PLL for detailed instruction on selecting appropriate values for L and E.
Unit
MHz
pF
pF
pF
MΩ
Unit
MHz
KHz
MHz
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 1
Freescale Semiconductor
295