MC9S12E128 MOTOROLA [Motorola, Inc], MC9S12E128 Datasheet - Page 101

• Manufacturer Part Number: MC9S12E128
• Description: MC9S12E-Family Device User Guide V01.04
• Manufacturer: MOTOROLA [Motorola, Inc]

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Central point of the ground star should be the VSSR pin.
Use low ohmic low inductance connections between VSS1, VSS2 and VSSR.
VSSPLL must be directly connected to VSSR.
Keep traces of VSSPLL, EXTAL and XTAL as short as possible and occupied board area for C7,
C8, C11 and Q1 as small as possible.
Do not place other signals or supplies underneath area occupied by C7, C8, C10 and Q1 and the
connection area to the MCU.
Central power input should be fed in at the VDDA/VSSA pins.
Component
C10
C11
Q1
C1
C2
C3
C4
C5
C6
C7
C8
C9
R1
Table 20-1 Recommended decoupling capacitor choice
Freescale Semiconductor, Inc.
VDD2 filter cap (80 QFP only)
For More Information On This Product,
VDDPLL filter cap
PLL loop filter cap
PLL loop filter cap
PLL loop filter res
VDDA filter cap
VDDR filter cap
VDDX filter cap
VDD1 filter cap
OSC load cap
OSC load cap
DC cutoff cap
Purpose
Quartz
Go to: www.freescale.com
Device User Guide — 9S12E128DGV1/D V01.04
X7R/tantalum
X7R/tantalum
ceramic X7R
ceramic X7R
ceramic X7R
ceramic X7R
See PLL specification chapter
Type
100 - 220nF
100 - 220nF
>=100nF
>=100nF
Value
100nF
100nF
101