• PC peripherals
(keyboard, mouse, joystick)
• RF wireless receivers
• USB converters
• USB security keys for
e-commerce
• Game pads
• Set-top box peripherals
TARGET APPLICATIONS
HIGH-PERFORMANCE 68HC08 CPU CORE
INTEGRATED SECOND GENERATION FLASH MEMORY
FULL USB 1.1 SPECIFICATION LOW-SPEED FUNCTIONS
MULTIPLE CLOCK OPTIONS
• In-application re-programmable
• Extremely fast programming, encoding
64 bytes in as fast as 2 msec
• FLASH programming across the 68HC08’s
full operating supply voltage with no extra
programming voltage
• 10K write/erase cycles minimum over
temperature
• Flexible block protection and security
• Cost-effective programming changes and
field software upgrades via in-application
programmability and re-programmability
• Reduces production programming costs
through ultra-fast programming
• Allows re-programmable battery-powered
applications
• Byte-writable for data as well as program
memory
• Protects code from unauthorized reading
and to guard against unintentional
erasing/writing of user-programmable
segments of code
• 1.5 Mbps data rate
• On-chip 3.3V regulator
• Endpoint 0 with 8-byte transmit buffer and
8-byte receive buffer
• Endpoint 1 with 8-byte transmit buffer
• Endpoint 2 with 8-byte transmit buffer and
8-byte receive buffer
• Designed to serve as a low-speed (LS) USB
device, in accordance with the Universal
Serial Bus Specification Rev. 1.1
• Integrated 3.3V regulator reduces system
cost
• Crystal oscillator
• Ceramic oscillator
• External clock
• RC oscillator
• Flexible clock options optimize timing
accuracy with system cost
FEATURES BENEFITS
A FLASH MCU SOLUTION
68HC908JB8
8-bit Microcontroller
This 8-bit 68HC908JB8 is an upwardly
compatible, versatile migration from
Motorola’s groundbreaking 68HC05
universal serial bus (USB) Family. The
innovative design features an on-chip USB
module for faster, more reliable PC
peripheral applications. An energy-saving,
low-power solution, the 68HC908JB8 is
embedded with Motorola’s second-
generation embedded FLASH technology to
enable in-system programmability.
•3 MHz bus operation at 3V for 333 nsec
minimum instruction cycle time
• Efficient instruction set including multiply
and divide
• 16 flexible addressing modes including
stack relative with 16-bit stack pointer
• Fully static low-voltage, low-power design
with wait and stop modes
• Object code compatible with the 68HC05
• Easy to learn and use architecture
•C optimized architecture provides compact
code
CPU08
256 RAM
8K FLASH
MON
BRK
SIM
IRQ
COP
LVI
OSC
TIM
KBI
USB
PORT A
PORT B
PORT C
PORT D
PORT E
VREG
8
8
8
8
5


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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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