Datasheet

Target Applications
• Battery-poweredapplications
• Residential/commercialgarage
dooropeners
• Smokedetectors
• Remotewindowshutters
• Remotecontrolapplications
• Battery-operatedtoysandgames
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 QB family demonstrates extreme
energy efficiency for ultra-long operating life
in battery-powered applications.
As a subset of QE family, the QB8 16-pin TSSOP
and 28-pin SOIC are pin compatible with the
QE8 device. The S08QB8 (QB8)
microcontroller
offers low-power features such as two ultra-
low-power stop modes, new low-power run and
wait modes,
6 μs wake-up time, ultra-low-power
external oscillator and clock gating registers to
disable clocks to unused peripherals.
The QB8 offers up to 8 KB of flash memory
and an 8-channel, 12-bit resolution analog-
to-digital converter (ADC). The S08QB8 can
be powered down to 1.8V and still able to
operate at maximum 20 MHz CPU speed. QB8
consists of a 8-bit modulo timer, a 16-bit timer/
pulse width modulator, UART, real time counter,
analog comparator, 8-channel keyboard interrupt
module—perfect for cost-effective, battery
sensitive, portable, low-power applications.
8-bit Fact Sheet
Ultra-Low-Power Microcontrollers
MC9S08QB8/4: Simplicity with Substance
Taking the lead in low power
Features
Benefits
Power-Saving Features
• Twoultra-low-power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
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512bytesofrandomaccessmemory(RAM)
with low ram retention voltage and security feature
• RAMcanholdcontentwithlowvoltagesupply.
This reduces over all power consumption.
• Securitycircuitrypreventsunauthorizedaccessto
RAMandashcontent.
Debugging/Interface
Peripherals Flash/ROM
RAM
Core plus Feature