Freescale Semiconductor, Inc.
A FLASH MCU SOLUTION
68HC908JB8
8-bit Microcontroller
TARGET APPLICATIONS
鈥?PC peripherals
(keyboard, mouse, joystick)
鈥?RF wireless receivers
鈥?USB converters
鈥?USB security keys for
e-commerce
鈥?Game pads
鈥?Set-top box peripherals
FEATURES
HIGH-PERFORMANCE 68HC08 CPU CORE
鈥?3 MHz bus operation at 3V for 333 nsec
minimum instruction cycle time
鈥?Efficient instruction set including multiply
and divide
鈥?16 flexible addressing modes including
stack relative with 16-bit stack pointer
鈥?Fully static low-voltage, low-power design
with wait and stop modes
BENEFITS
Freescale Semiconductor, Inc...
鈥?Object code compatible with the 68HC05
鈥?Easy to learn and use architecture
鈥?C optimized architecture provides compact
code
This 8-bit 68HC908JB8 is an upwardly
compatible, versatile migration from
Motorola鈥檚 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鈥檚 second-
generation embedded FLASH technology to
enable in-system programmability.
INTEGRATED SECOND GENERATION FLASH MEMORY
鈥?In-application re-programmable
鈥?Extremely fast programming, encoding
64 bytes in as fast as 2 msec
鈥?FLASH programming across the 68HC08鈥檚
full operating supply voltage with no extra
programming voltage
鈥?10K write/erase cycles minimum over
temperature
鈥?Flexible block protection and security
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 to guard against unintentional
erasing/writing of user-programmable
segments of code
CPU08
KBI
PORT A
8
FULL USB 1.1 SPECIFICATION LOW-SPEED FUNCTIONS
鈥?1.5 Mbps data rate
鈥?On-chip 3.3V regulator
鈥?Endpoint 0 with 8-byte transmit buffer and
8-byte receive buffer
鈥?Endpoint 1 with 8-byte transmit buffer
鈥?Endpoint 2 with 8-byte transmit buffer and
8-byte receive buffer
鈥?Designed to serve as a low-speed (LS) USB
device, in accordance with the Universal
Serial Bus Specification Rev. 1.1
鈥?Integrated 3.3V regulator reduces system
cost
256 RAM
TIM
PORT B
8
8K FLASH
USB
PORT C
8
MON
PORT D
BRK
V
RE
G
PORT E
SIM
8
5
MULTIPLE CLOCK OPTIONS
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Crystal oscillator
Ceramic oscillator
External clock
RC oscillator
鈥?Flexible clock options optimize timing
accuracy with system cost
IRQ
COP
LVI
OSC
For More Information On This Product,
Go to: www.freescale.com
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