MC9S08QE4CWL Datasheet, PDF (1/2 Pages) Freescale Semiconductor, Inc – Taking the lead in low power

Ultra-Low-Power Microcontrollers
MC9S08QE8/4
Taking the lead in low power
8-bit Fact Sheet
Target Applications
• Low-power wireless applications
• Security systems
• Personal health care devices
• Cell phone accessories
• Commercial smoke detectors
• Security sensors
• Toys
Overview
Achieving raw performance is no longer the
number one issue—it’s now “performance within
an energy budget.” Freescale understands this
challenge and offers a wide portfolio of S08
devices that help you reach target performance
levels while minimizing low power in your
design. The QE family demonstrates extreme
energy efficiency for ultra-long operating life
in battery-powered applications.
A member of the QE family, the QE8 32-pin-LQFP
device is pin compatible with the QE128 S08
and ColdFire^® V1 devices. The S08QE8 (QE8)
microcontroller offers low-power features
such as two ultra-low-power stop modes,
new low-power run and wait modes, six μs
wake-up time, ultra-low-power external oscillator
and clock gating registers to disable clocks to
unused peripherals.
The QE8 offers up to 8 KB of flash memory and
a 10-channel, 12-bit resolution analog-to-digital
converter (ADC). The S08QE8 programs down to
1.8V, a 20 MHz CPU core, two timers, UART, SPI,
I²C and two analog comparators—perfect for
cost-effective portable health care applications.
To test your application with the QE8, take
the Battery Calculator challenge, available at
www.freescale.com/lowpower.
Features
Power-Saving Features
• Two ultra-low-power (ULP) stop modes, one of
which allows limited use of peripherals
• New low-power run and wait modes
• 6 µs typical wake up time from stop mode
• Internal clock Source (ICS)—module containing a
frequency locked-loop (FLL) controlled by internal
or external reference
• Oscillator (OSC)—loop-control Pierce oscillator;
crystal or ceramic resonator range of 31.25 kHz to
38.4 kHz or 1 MHz to 16 MHz
• Clock gating disables clocks to unused peripherals
8-bit HCS08 Central Processing Unit (CPU)
• Up to 20 MHZ HCS08 CPU from 1.8V to 3.6V and
across temperature range of -40°C to +85°C
• HCS08 instruction set with added BGND instruction
On-Chip Memory
• Up to 8 KB flash read/program/erase over full
operating voltage and temperature
• Up to range of 1.8V to 3.6V random-access
memory (RAM)
Benefits
• Allows continued application sampling in a reduced
power state which extends battery life
• Allows use of all chip peripherals in a low-power state
• Enables faster execution out of stop modes
• Provides choice of frequencies on-the-fly.
Reducing frequency saves current.
• Includes ultra-low-power OSC for accurate
timebase in low-power modes
• Provides flexibility to turn off individual modules
• Reduces power consumption
• Offers high performance, even at low voltage levels
for battery-operated applications
• Provides bus speed operation of 10 MHz from
1.8V to 3.6V
• Easy to learn and use architecture
• Backward object code compatibility with 68HC08 and
68HC05 for reuse of existing libraries can still be used
• Allows for efficient, compact module coding in
assembly or C compiler
• BGND allows user to enter background debug
mode that takes advantage of on-chip
in-circuit emulator (ICE)
• Allows user to take full advantage of
in-application, reprogrammability benefits in
virtually any environment
• Security circuitry prevents unauthorized access
to RAM and flash contents to reduce system
power consumption