Freescale Semiconductor, Inc.
A FLASH MCU SOLUTION
68HC908LJ12
8-bit Microcontroller
FEATURES
TARGET APPLICATIONS
鈥?Portable audio/video
鈥?Personal appliances
鈥?Air conditioners
鈥?Microwave ovens
鈥?Boilers
鈥?Cameras
鈥?Medical instruments
鈥?Remote controls
鈥?Electric power meters
鈥?Thermostats
BENEFITS
HIGH-PERFORMANCE 68HC08 CPU CORE
鈥?8 MHz bus operation (at 5V) for 125 nsec
minimum instruction cycle time
鈥?4 MHz bus operation (at 3.3V) for 250 nsec
minimum instruction cycle time
鈥?2 MHz bus operation (at 2.4V) for 500 nsec
minimum instruction cycle time
鈥?Efficient instruction set including multiply
and divide
鈥?16 flexible addressing modes including
multiply and divide
鈥?Fully static low-voltage, low-power design
with wait and stop modes
鈥?Object code compatible with the 68HC08
family
鈥?Easy to learn and use architecture
鈥?C-optimized architecture provides compact
code
Freescale Semiconductor, Inc...
INTEGRATED SECOND GENERATION FLASH MEMORY
The 68HC908LJ12 is a fully integrated
microcontroller created to make system
design easier by eliminating external
peripherals, wherever possible. The 32 kHz
phase-locked loop (PLL) eliminates the need
for expensive, high-speed crystals or noisy
oscillators. The integrated second generation
FLASH memory programs up to 100 times
faster than previous FLASH solutions and
offers in-application programming. Features
include a synchronous serial peripheral
interface (SPI), an asynchronous serial
communications interface (SCI) with infrared
modulator/demodulator, an analog-to-digital
converter (ADC), a liquid crystal display (LCD)
driver, a real-time clock, an auto wakeup-
from-stop feature, low-voltage inhibit (LVI)
and a watchdog timer.
鈥?In-application re-programmable
鈥?Extremely fast programming; encoding
64 bytes in as fast as 2 msec
鈥?FLASH programming across the 68HC08
devices鈥?full operating supply voltage
with no extra programming voltage
鈥?10K write/erase cycles minimum over
temperature
鈥?Flexible block protection and security
鈥?ROM-resident in-circuit programming
and emulated EEPROM routines
鈥?Cost-effective programming changes and
field software upgrades via in-application
programmability and re-programmability
鈥?Reduces production programming costs
through ultra-fast programming
鈥?Allows re-programmable battery-powered
applications
鈥?Byte-writable for data, as well as program
memory
鈥?Protects code from unauthorized reading
and guards against unintentional
erasing/writing of user-programmable
segments of code
鈥?ROM-resident programming routines
simplify user codes
10-BIT ANALOG-TO-DIGITAL CONVERTER
鈥?Six channels
鈥?Single conversion in 8.5 碌sec
鈥?Fast, easy conversion from analog inputs鈥?/div>
such as temperature, pressure and fluid
levels鈥攖o digital values for CPU processing
CLOCK GENERATION MODULE WITH PLL
CPU
512 RAM
12K
FLASH
TIM1
TIM2
PORT A
PORT B
8
8
8
8
鈥?Programmable clock frequency in integer
multiples of external crystal reference
鈥?Crystal reference of 32 kHz to 100 kHz
鈥?External clock option with or without PLL
鈥?Provides high performance using low-cost,
low-frequency reference crystals
鈥?Reduces generated noise while still
providing high performance (up to 32 MHz)
SCI & IR
SPI
LCD
10-BIT
ADC
RTC
PORT C
MON
BRK
SIM
SIM
PORT D
TWO PROGRAMMABLE 16-BIT TIMERS, EACH WITH TWO CHANNELS
鈥?125 nsec resolution at 8 MHz bus
鈥?Free-running counter or module up-counter
鈥?Each channel independently programmable
for input capture, output compare,
unbuffered PWM
鈥?Pairing timer channels provides a buffered
PWM function
REAL-TIME CLOCK MODULE
IRQ
COP
LVI
CGMC
RBI
鈥?Second, minute, hour, day, day of week,
month, year counters
鈥?Automatic calendar with leap year
adjustment
鈥?10 msec chronograph counter
鈥?Alarm and seven periodic interrupts
For More Information On This Product,
鈥?Provides auto-wakeup from low-power
stop mode to check external device status
(such as status of sensors)
鈥?Auto-wakeup can be periodic or at a
defined time
Go to: www.freescale.com
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