MC912D60CCPVE Freescale Semiconductor, MC912D60CCPVE Datasheet - Page 193

• Manufacturer Part Number: MC912D60CCPVE
• Description: IC MCU 16BIT 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC912D60CCPVE

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: CAN, MI Bus, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 68
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x8/10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 112-LQFP
• Processor Series: HC912D
• Core: HC12
• Data Bus Width: 16 bit
• Data Ram Size: 2 KB
• Interface Type: CAN, SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 86
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12.4.5 MC68HC912D60C Oscillator Design Guidelines
MC68HC912D60A — Rev. 3.1
Freescale Semiconductor
NOTE:
Proper and robust operation of the oscillator circuit requires excellent
board layout design practice. Poor layout of the application board can
contribute to EMC susceptibility, noise generation, slow starting
oscillators, and reaction to noise on the clock input buffer. In addition to
published errata for the MC68HC912D60A, the following guidelines
must be followed or failure in operation may occur.
An increase in the EXTAL–XTAL parasitic as a result of reducing
EXTAL–VSS parasitic is acceptable provided component value is
reduced by the appropriate value.
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•
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Minimize Capacitance to VSS on EXTAL pin — The Colpitts
oscillator architecture is sensitive to capacitance in parallel with
the resonator (from EXTAL to VSS). Follow these techniques:
Shield all oscillator components from all noisy traces (while
observing above guideline).
Keep the VSSPLL pin and the VSS reference to the oscillator
as identical as possible. Impedance between these signals must
be minimum.
Observe best practice supply bypassing on all MCU power
pins. The oscillator’s supply reference is VDD, not VDDPLL.
Account for XTAL–VSS and EXTAL–XTAL parasitics in
component values. The specified component values assume a
maximum parasitic capacitance of 1pF and 0.1pF, respectively.
iii. Where possible, use XTAL as a shield between EXTAL
iv. Keep EXTAL capacitance to less than 1pF (2pF
ii. Observe a minimum spacing from the EXTAL trace to all
i. Remove ground plane from all layers around resonator
and EXTAL route
other traces of at least three times the design rule
minimum (until the microcontroller’s pin pitch prohibits
this guideline)
and VSS
absolute maximum)
Oscillator
MC68HC912D60C Colpitts Oscillator Specification
Technical Data
Oscillator
193