MC68HC908LK24CFQ Freescale Semiconductor, MC68HC908LK24CFQ Datasheet - Page 202
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MC68HC908LK24CFQ
Manufacturer Part Number
MC68HC908LK24CFQ
Description
IC MCU 24K FLASH 8MHZ SPI 80-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908LK24CFUE.pdf
(464 pages)
Specifications of MC68HC908LK24CFQ
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, IRSCI, SPI
Peripherals
LCD, LVD, POR, PWM
Number Of I /o
40
Program Memory Size
24KB (24K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
80-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68HC908LK24CFQ
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC68HC908LK24CFQ
Manufacturer:
FRE/MOT
Quantity:
20 000
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Timer Interface Module (TIM)
11.5.4.1 Unbuffered PWM Signal Generation
Data Sheet
202
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. See
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)
11.5.4 Pulse Width Modulation
Figure 11-3. PWM Period and Pulse Width
PULSE
WIDTH
PERIOD
11.10.1 TIM Status and Control
COMPARE
OUTPUT
OVERFLOW
MC68HC908LJ24/LK24 — Rev. 2.1
COMPARE
OUTPUT
(PWM). The pulses are
OVERFLOW
Freescale Semiconductor
Register.
COMPARE
OUTPUT
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