MC68HC908LB8CPE Freescale Semiconductor, MC68HC908LB8CPE Datasheet - Page 102

• Manufacturer Part Number: MC68HC908LB8CPE
• Description: IC MCU 8K FLASH 8MHZ 20DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908LB8CPE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVR, POR, PWM
• Number Of I /o: 18
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 7x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

High Resolution PWM (HRP)
102
Care must be taken when setting the duty cycle and deadtime values to
ensure that a PWM signal appears on both TOP and BOT when using the
module to control a half bridge. It is possible to configure the HRP to output
a continuous logic 0 on TOP or BOT.
If the deadtime is equal to or greater than the duty cycle value, the BOT
output will will remain at logic 0, while TOP will output a PWM signal. (See
Figure
Similarly, if the deadtime is equal to or greater than the period minus the
duty cycle value, the TOP output will remain at logic 0, while BOT will output
a PWM signal. (See
TOP OUT
BOT OUT
TOP IN
BOT IN
10-8.) The duty cycle refers to the high level on BOT.
Figure 10-7. Deadtime Insertion Waveforms
DT[7:0]
Figure
MC68HC908LB8 Data Sheet, Rev. 1
DT[7:0]
10-9.)
NOTE
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