Datasheet

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,
I
2
C 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.
8-bit Fact Sheet
Ultra-Low-Power Microcontrollers
MC9S08QE8/4
Taking the lead in low power
Features
Benefits
Power-Saving Features
• Twoultra-low-power(ULP)stopmodes,oneof
which allows limited use of peripherals
• 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
• 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
• Provideschoiceoffrequencieson-the-y.
Reducing frequency saves current.
• 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
• Includesultra-low-powerOSCforaccurate
timebase in low-power modes
• Clockgatingdisablesclockstounusedperipherals
• Providesexibilitytoturnoffindividualmodules
• Reducespowerconsumption
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
• 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
• HCS08instructionsetwithaddedBGNDinstruction
• 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efcient,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)
On-Chip Memory
• Upto8KBashread/program/eraseoverfull
operating voltage and temperature
• Allowsusertotakefulladvantageof
in-application,reprogrammabilitybenetsin
virtually any environment
• Uptorangeof1.8Vto3.6Vrandom-access
memory (RAM)
• Securitycircuitrypreventsunauthorizedaccess
toRAMandashcontentstoreducesystem
power consumption