MC9S12E64CFU Freescale Semiconductor, MC9S12E64CFU Datasheet - Page 359

• Manufacturer Part Number: MC9S12E64CFU
• Description: IC MCU 64K FLASH 25MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12E64CFU

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, I²C, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 60
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 2.75 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Data Bus Width: 16 bit
• Data Ram Size: 4 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 60
• Number Of Timers: 16 bit
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• On-chip Dac: 8 bit, 2 Channel
• For Use With: M68EVB912E128 - BOARD EVAL FOR MC9S12E128/64
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: No RoHS Version Available

In an edge-aligned operation, the PWM counter is an up counter. The PWM output resolution is one bus
clock cycle.
11.4.3.3
The signed 16-bit number written to the PMF value registers is the pulse width in PWM clock periods of
the PWM generator output.
Freescale Semiconductor
PWM period = PWM modulus PWM clock period
Duty Cycle
A PWM value less than or equal to zero deactivates the PWM output for the
entire PWM period. A PWM value greater than or equal to the modulus
activates the PWM output for the entire PWM period.
PWM PERIOD = 4 x PWM CLOCK PERIOD
$8000–$FFFF
$0000–$7FFF
Table 11-46. PWM Value and Underflow Conditions
PMFVALx
Figure 11-44. Edge-Aligned PWM Period
PWM CLOCK PERIOD
MC9S12E128 Data Sheet, Rev. 1.07
Duty cycle
MODULUS = 4
UP COUNTER
COUNT
Condition
Underflow
Normal
=
Chapter 11 Pulse Width Modulator with Fault Protection (PMF15B6CV2)
NOTE
------------------------------- -
MODULUS
PMFVAL
1
2
PWM Value Used
Value in registers
3
100
4
$0000
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