MC9S12P64VQK Freescale Semiconductor, MC9S12P64VQK Datasheet - Page 241

• Manufacturer Part Number: MC9S12P64VQK
• Description: 16-bit Microcontrollers - MCU 16 BIT 64K FLASH
• Manufacturer: Freescale Semiconductor

Specifications of MC9S12P64VQK

• Rohs: yes
• Core: S12
• Processor Series: MC9S12P
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 64 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 4 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 5 V
• Operating Temperature Range: - 40 C to 105 C
• Package / Case: QFP-80
• Mounting Style: SMD/SMT
• Interface Type: I2C, SCI, SPI
• Program Memory Type: Flash

7.4.5
7.4.5.1
An example of how to use the oscillator as Bus Clock is shown in
Freescale Semiconductor
EXTAL
UPOSC
OSCCLK
PLLSEL
Core
Clock
OSCE
External Oscillator
Enabling the External Oscillator
enable external oscillator by writing OSCE bit to one.
based on PLLCLK
crystal/resonator starts oscillating
Figure 7-34. Enabling the External Oscillator
S12P-Family Reference Manual, Rev. 1.13
select OSCCLK as Core/Bus Clock by writing PLLSEL to zero
UPOSC flag is set upon successful start of oscillation
S12 Clock, Reset and Power Management Unit (S12CPMU)
based on OSCCLK
Figure
7-34.
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