MC9S12DG128VPV Freescale Semiconductor, MC9S12DG128VPV Datasheet - Page 82

• Manufacturer Part Number: MC9S12DG128VPV
• Description: IC MCU 128K FLASH 25MHZ 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12DG128VPV

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: CAN, I²C, SCI, SPI
• Peripherals: PWM, WDT
• Number Of I /o: 91
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 112-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MC9S12DT128B Device User Guide — V01.09
Section 22 Printed Circuit Board Layout Proposal
The PCB must be carefully laid out to ensure proper operation of the voltage regulator as well as of the
MCU itself. The following rules must be observed:
•
•
•
•
•
•
•
Every supply pair must be decoupled by a ceramic capacitor connected as near as possible to the
corresponding pins (C1 – C6).
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
C11 / C
C10 / C
C9 / C
R2 / R
R3 / R
R1 / R
Q1
C1
C2
C3
C4
C5
C6
C7
C8
Table 22-1 Suggested External Component Values
DC
S
B
S
P
Freescale Semiconductor, Inc.
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
VDD2 filter cap
OSC load cap
OSC load cap
DC cutoff cap
Purpose
Quartz
Go to: www.freescale.com
Colpitts mode only, if recommended by
X7R/tantalum
X7R/tantalum
ceramic X7R
ceramic X7R
ceramic X7R
ceramic X7R
See PLL Specification chapter
See PLL specification chapter
Type
quartz manufacturer
Pierce mode only
100 … 220nF
100 … 220nF
>= 100nF
>= 100nF
Value
100nF
100nF