Lots of companies make IEEE 802.15.4
and ZigBee wireless modules, but
California Eastern Laboratories (CEL)
offers one with an internal 32-bit ARM
processor. The FreeStar Pro is a complete
radio module that’s ready to go as a
node in wireless network (see the figure).
Based on Freescale Semiconductor’s
MC13224V Platform-in-Package (PiP), the FreeStar Pro features the ARM 32-bit
processor, expansive on-chip memory,
and I/O to enable designers to eliminate
the peripheral host processors often
required by 8- and 16-bit transceiver
solutions. This high level of integration
helps reduce component count, lower
power consumption, and reduce overall
system costs.
The Freescale MC13224V provides a
complete 802.15.4 radio and the ARM
processor. The radio includes an RF
matching section with balun on-chip. It
only needs a crystal and a 50- antenna.
The processor is an ARM7 with 128k serial
flash, 96-kbyte RAM, 80k ROM, AES
128-bit encryption, and a JTAG debug
port. Other I/Os include two 12-bit analog-
to-digital converters (ADCs), generalpurpose
I/O (GPIO), serial peripheral
interface (SPI), UARTs, and a timer.
The FreeStar Pro modules are
designed for any application where the
IEEE 802.15.4/ZigBee standards are
appropriate, including remote sensing,
automated meter reading, home and
building automation, industrial control,
and security. They can be used to build
point-to-point, point-to-multipoint, and
mesh networks.
With 20-dBm output power, they have
a maximum range of up to 4000 ft. Their
low power consumption makes them
ideal for battery-powered designs. The
module measures just 23 by 31 mm, and
it has an integrated antenna to further
reduce system size and cost. An external
antenna connection is an option.
LOUIS E. FRENZEL
CALIFORNIA EASTERN LABORATORIES
www.cel.com
