Datasheet

Electrical Specifications
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
294 Freescale Semiconductor
21.9 Clock Generation Module Characteristics
21.9.1 CGM Component Specifications
21.9.2 CGM Electrical Specifications
Characteristic Symbol Min Typ Max Unit
Crystal frequency
f
XCLK
148MHz
Crystal load capacitance
(1)
1. Consult crystal manufacturer’s data.
C
L
———pF
Crystal fixed capacitance
C
1
—
(2 x C
L
) –5
—pF
Crystal tuning capacitance
C
2
—
(2 x C
L
) –5
—pF
Feedback bias resistor
R
B
11020MΩ
Characteristic Symbol Min Typ Max Unit
Reference frequency (for PLL operation)
f
RCLK
148MHz
Range nominal multiplier
f
NOM
— 71.42 — KHz
Programmed VCO center-of-range frequency
(1)
1. See 4.3.6 Programming the PLL for detailed instruction on selecting appropriate values for L and E.
f
VRS
—
(Lx2
E
)f
NOM
—MHz