Datasheet

Electrical Specifications
MC68HC908GR16A Data Sheet, Rev. 1.0
254 Freescale Semiconductor
20.9 Clock Generation Module (CGM) Characteristics
20.9.1 CGM Component Specifications
20.9.2 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
—20—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
0.5 1 10 MΩ
Series resistor R
S
—0—Ω
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