Appendix C Recommended PCB Layout
MC9S12XDP512 Data Sheet, Rev. 2.11
970 Freescale Semiconductor
Table C-1. Recommended Decoupling Capacitor Choice
Component Purpose Type Value
C1 V
DD1
filter capacitor Ceramic 220 nF
C2 V
DD2
filter capacitor
(not available on the 80-pin QFP
packaging option)
Ceramic X7R 220 nF
C3 V
DDA
filter capacitor Ceramic X7R >=100 nF
C4 V
DDR
filter capacitor X7R/tantalum >=100 nF
C5 V
DDPLL
filter capacitor Ceramic X7R 220 nF
C6 V
DDX
filter capacitor X7R/tantalum >=100 nF
C7 OSC load capacitor Comes from crystal manufacturer
C8 OSC load capacitor
C9 PLL loop filter capacitor See PLL specification chapter
C10 PLL loop filter capacitor
C11 V
DDX
filter capacitor X7R/tantalum >=100 nF
C12 V
DDX
filter capacitor X7R/tantalum >=100 nF
R1 PLL loop filter resistor See PLL specification chapter
Q1 Quartz — —