MC9S12E256VFUE Freescale Semiconductor, MC9S12E256VFUE Datasheet - Page 370

• Manufacturer Part Number: MC9S12E256VFUE
• Description: IC MCU 256K FLASH 25MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12E256VFUE

• 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: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K 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 ~ 105°C
• Package / Case: 80-QFP
• Processor Series: S12E
• Core: HCS12
• Data Bus Width: 16 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, SCI, SPI
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 60
• Number Of Timers: 12
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• On-chip Dac: 8 bit, 2 Channel
• Package: 80PQFP
• Family Name: HCS12
• Maximum Speed: 50 MHz
• For Use With: M68EVB912E128 - BOARD EVAL FOR MC9S12E128/64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Chapter 11 Pulse Width Modulator with Fault Protection (PMF15B6CV2)
11.4.7.3
With a reload opportunity, regardless an actual reload occurs as determined by LDOK bit, the PWMF
reload flag is set. If the PWM reload interrupt enable bit, PWMRIE is set, the PWMF flag generates CPU
interrupt requests allowing software to calculate new PWM parameters in real time. When PWMRIE is
not set, reloads still occur at the selected reload rate without generating CPU interrupt requests.
370
Reload Flag
PWM VALUE = 1
MODULUS = 3
READ PWMRF AS 1 THEN
PWMRF = 1
UP/DOWN
COUNTER
PWM VALUE = 1
LDOK = 1
MODULUS = 2
PWM
Figure 11-68. Full-Cycle Center-Aligned PWM Value Loading
WRITE 0 TO PWMF
Up/Down
COUNTER
PWMRF = 1
Figure 11-69. Full-Cycle Center-Aligned Modulus Loading
PWM Reload
LDOK = 1
PWM
Figure 11-67. PWMRF Reload Interrupt Request
RESET
MC9S12E256 Data Sheet, Rev. 1.08
HALF = 0, LDFQ[3:0] = 00 = Reload every cycle
HALF = 0, LDFQ[3:0] = 00 = Reload every cycle
0
3
2
1
1
3
1
1
Vdd
D
CLK
CLR
Q
1
3
2
1
PWMRIE
PWMRF
1
2
1
1
1
1
1
1
0
3
1
1
CPU Interrupt
Request
0
2
1
1
Freescale Semiconductor