8-bit Microcontrollers
8-bit Microcontrollers
HC08 QC Family
Overview
Cost-Effective LIN Family
Features
Freescale Semiconductor’s QC family of
microcontrollers (MCUs) is positioned to
support HC08 core small-package 8-bit
microcontrollers for general market use.
The QC family is ideal for the low-end
Local Interconnect Network (LIN) market.
The functionality is completed with strong
analog capabilities, a complete set of serial
modules and robust memory options.
These products are fully LIN 2.0 and J2602
compliant. They are intended to be used as
LIN slaves where the application requires
cost-effective hardware solutions. A variety of
small packages (16-, 20- and 28-pin), together
with the optimized peripheral sets, and the
powerful HC08 CPU, make this an ideal
low-end controller.
Benefits
Second-Generation Flash or Cost-Effective ROM Memory Options
• Embedded, fully automotive flash
• Qualified for high temperatures, shock,
vibrations and humidity as required by the
automotive industry
• Range of memory from 4 KB to 16 KB
• 10K write/erase cycles at -40°C to +125°C
• Cost-reduction path for high-volume stable
programs
• Ultra-fast programming: 64 bytes in 2 ms
• Flash block protection
• Reduced production programming costs through
ultra-fast programming at operating voltage
• Helps protect code from unauthorized reading
and to guard against unintentional writing/
erasing of user-programmable segments of code
• Flash reprogrammable in circuit
Internal Clock Oscillator
• Allows real-time flash updates
• 1 MHz, 2 MHz and 3.2 MHz nominal bus
frequencies
• Eliminates the cost of all external clock
components
• Fully trimmable internal oscillator
• Helps to reduce board space
• Less than 0.4 percent oscillator accuracy within
a LIN frame
• Eliminates or reduces EMI generated from
external clocks
• Allows option of external RC and external crystal
Typical Applications of the QC Family
An application focus area of the QC family
is the LIN. LIN is a UART-based, single-
master, multiple-slave networking architecture
originally developed for automotive sensor
and actuator networking applications.
Enhanced SCI—LIN Controller
• Programmable 8-bit or 9-bit character length
• Programmable baud rates
• Full-duplex operation allows simultaneous
transmission and reception of data
• ESCI arbiter allows measurement of LIN
synchronization data without separate timer
hardware
• Separately enabled transmitter and receiver
• Interrupt-driven operation with eight interrupt
flags
• Finely adjustable baud rate prescalers allow
extremely precise control of baud rate
• Capable of communication rates up to
115,000 bps, encompassing all LIN baud rates
Application Specific Application Examples for LIN
Segments Slaves
• Enhanced detection of LIN break symbols to
prevent false interrupts
Roof
Sensor, light sensor, light control,
sun roof
Periodic Wake-Up Module
• Selectable timeout periods (40 µs to three
minutes)
• ESCI arbiter allows measurement of LIN
synchronization data without separate timer
hardware
Steering
wheel
Cruise control, wiper, turning light,
climate control, radio
• Exit from low-power stop mode without external
signals
• Finely adjustable baud rate prescalers allow
extremely precise control of baud rate
Seat
Seat position motors, occupancy sensor,
control panel
• Dedicated low-power 32 kHz internal oscillator
separate from the main system clock sources
• Enhanced detection of LIN break symbols to
prevent false interrupts
Engine
Climate
Door
Sensors, small motors
• Accessible in all modes of operation (run,
wait and stop)
Small motors, control panel
• Full-duplex operation allows simultaneous
transmission and reception of data
Mirror, central ECU, mirror switch,
window lift, seat control switch, door lock
Root Part
Number
ROM
Available
Operating
Voltage
Flash
RAM
UART
SPI Analog (ADC)
Timer
Clock Pin Count
Additional Features
Market Focus
Up to 10-ch.,
10-bit ADC
4-ch.
+2-ch.
16 MHz CPU, COP, LVI,
POR, KBI
LIN/J2602, Watchdog,
General Market
908QC16 16 KB
3
512B
1xESCI
1
OSC
OSC
OSC
16, 20, 28
16, 20, 28
16, 20, 28
3.0 to 5.5
Up to 10-ch.,
10-bit ADC
4-ch.
+2-ch.
16 MHz CPU, COP, LVI,
POR, KBI
LIN/J2602, Watchdog,
General Market
908QC8
908QC4
8 KB
4 KB
3
384B
384B
1xESCI
1xESCI
1
3.0 to 5.5
3.0 to 5.5
Up to 10-ch.,
10-bit ADC
4-ch.
+2-ch.
16 MHz CPU, COP, LVI,
POR, KBI
LIN/J2602, Watchdog,
General Market
1
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