MC9S12P32CFT Freescale Semiconductor, MC9S12P32CFT Datasheet - Page 242

• Manufacturer Part Number: MC9S12P32CFT
• Description: MCU 16BIT 32K FLASH 48-QFN
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12P32CFT

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 32MHz
• Connectivity: CAN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.72 V ~ 5.5 V
• Data Converters: A/D 10x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-QFN Exposed Pad
• Processor Series: S12P
• Core: HCS12
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: KIT33812ECUEVME, DEMO9S12PFAME
• Package: 48QFN EP
• Family Name: HCS12
• Maximum Speed: 32 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 16 Bit
• Interface Type: CAN/SCI/SPI
• On-chip Adc: 10-chx12-bit
• Number Of Timers: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

S12 Clock, Reset and Power Management Unit (S12CPMU)
7.4.5.2
A spike in the oscillator clock can disturb the function of the modules driven by this clock.
The adaptive Oscillator Filter includes two features:
242
1. Filter noise (spikes) from the incoming external oscillator clock. The filter function is illustrated in
2. Detect severe noise disturbances on the external oscillator clock, which can not be filtered and
Figure
indicate the critical situation to the software by clearing the UPOSC and LOCK status bit and
setting the OSCIF and LOCKIF flag. An example for the detection of critical noise is illustrated in
Figure
OSCCLK
(filtered)
OSCCLK
(filtered)
OSCE
OSC
FILT
EXTAL
LOCK
UPOSC
OSCE
OSC
FILT
EXTAL
LOCK
UPOSC
The Adaptive Oscillator Filter
7-35.
7-36.
If the LOCK bit is clear due to severe noise disturbance on the external
oscillator clock the PLLCLK is derived from the VCO clock (with its actual
frequency) divided by four (see also
Divider Register
Figure 7-36. Critical noise detected by the Adaptive Oscillator Filter
0
0
Figure 7-35. Noise filtered by the Adaptive Oscillator Filter
enable external oscillator
configure the Oscillator Filter
enable external oscillator
configure the Oscillator Filter
> 0
> 0
(CPMUPOSTDIV))
crystal/resonator starts oscillating
crystal/resonator starts oscillating
S12P-Family Reference Manual, Rev. 1.13
NOTE
Section 7.3.2.3, “S12CPMU Post
phase shift can not be filtered but detected
filtered
filtered
Freescale Semiconductor