The wearable 3D accelerometer [25] has size of 85 (l) x 53 (w) x 16 (h) mm, weight 70 g, 4 digits LCD, on board
ARM7 microprocessor, and 128 Hz sampling frequency of raw accelerations.
Their mote is based on a 32-bit
ARM7 micro-controller operating at 48 MHz and reading up to 64 KB of on-chip RAM.
In the hardware circuit design, choose LPC2210
ARM7 microprocessor as the main controller, the expansion of NOR flash, NAND flash were used to store programs and data, selected GPRS module M23 embedded TCP/IP protocol stack as data transmission module, through at commands to operate the TCP/IP protocol to connect to the Internet, reduced the difficulty of programming, shorten the development cycle.
This section provides the summary of the reference framework onto which the application has been tested and the
ARM7 processor provided by the Atmel is a 32 bit processor which is particularly used for mobile and low power device applications.
The real-time data are collected by
ARM7 and transmitted through RS485 bus to the upper PC which receives the data by using MATLAB serial communication.
The Cortex-M3 is a next generation core that offers better performance than the
ARM7 at the same clock rate and other system enhancements such as modernized debug features and a higher level of support block integration.
The ARM test chip can be replaced by
ARM7, ARM9, ARM10, and ARM11 series CPU module [16].
IAR Systems said I-jet offers support for microcontrollers based on
ARM7, ARM9, ARM11, ARM Cortex-M, ARM Cortex-R4 and ARM Cortex-A5/A8/A9 cores.