MC908LD64IFUE Freescale Semiconductor, MC908LD64IFUE Datasheet - Page 156

• Manufacturer Part Number: MC908LD64IFUE
• Description: IC MCU 8BIT FOR LCD 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908LD64IFUE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 6MHz
• Connectivity: I²C, USB
• Peripherals: OSD, POR, PWM
• Number Of I /o: 39
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 64-QFP
• Processor Series: HC08LD
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: I2C, USB
• Maximum Clock Frequency: 6 MHz
• Number Of Programmable I/os: 39
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, M68CBL05CE
• Minimum Operating Temperature: 0 C
• On-chip Adc: 8 bit, 6 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Timer Interface Module (TIM)
11.5.4.1 Unbuffered PWM Signal Generation
Data Sheet
156
The value in the TIM counter modulo registers and the selected
prescaler output determines the frequency of the PWM output. The
frequency of an 8-bit PWM signal is variable in 256 increments. Writing
$00FF (255) to the TIM counter modulo registers produces a PWM
period of 256 times the internal bus clock period if the prescaler select
value is 000
The value in the TIM channel registers determines the pulse width of the
PWM output. The pulse width of an 8-bit PWM signal is variable in 256
increments. Writing $0080 (128) to the TIM channel registers produces
a duty cycle of 128/256 or 50%.
Any output compare channel can generate unbuffered PWM pulses as
described in
unbuffered because changing the pulse width requires writing the new
pulse width value over the old value currently in the TIM channel
registers.
An unsynchronized write to the TIM channel registers to change a pulse
width value could cause incorrect operation for up to two PWM periods.
For example, writing a new value before the counter reaches the old
value but after the counter reaches the new value prevents any compare
during that PWM period. Also, using a TIM overflow interrupt routine to
write a new, smaller pulse width value may cause the compare to be
missed. The TIM may pass the new value before it is written.
TCHx
OVERFLOW
Timer Interface Module (TIM)
(see 11.10.1 TIM Status and Control Register
11.5.4 Pulse Width Modulation
Figure 11-2. PWM Period and Pulse Width
PULSE
WIDTH
PERIOD
COMPARE
OUTPUT
OVERFLOW
COMPARE
OUTPUT
(PWM). The pulses are
MC68HC908LD64
OVERFLOW
Freescale Semiconductor
(TSC)).
—
COMPARE
OUTPUT
Rev. 3.0