J-Tech Engineering - Embedded RF Analog and Digital Hardware

EP7209 Evaluation Board: Reference platform for the Cirrus Logic PS7211/EP7209 RISC processor (ARM7TDMI core), including interfaces to keyboard, multiple LCD displays, touch screen overlay, PCMCIA interface, USB port, 10BaseT ethernet, 16Mbytes DRAM, 16Mbytes flash, 32Mbytes NAND flash, SmartMedia interface, RS-232 ports, IrDA, parallel port, 16-bit stereo sound, and local switching supplies. This board also features a module site for mounting different processors in different packages (such as BGAs) on the main board.

ARM Daemon Debug Monitor software port with additional flash programming interface for customer's proprietary Cirrus Logic CL-PS7500FE (ARM710C core) based platform. The flash suite was for burning Intel Strataflash.

CL-PS7500FE Evaluation Board: Reference platform for the Cirrus Logic CL-PS7500FE RISC (ARM 710C core) processor, including interfaces to keyboard, mouse, serial ports, IrDA, parallel port, ISA slots, 10BaseT ethernet, VGA/LCD/NTSC displays, modem, 16-bit stereo audio and local switching power supplies.

DC Uninterrupted Power Supply: Modular Uninterrupted Power Supply for supplying DC power to the electric brakes of a DC powered ladle crane in a steel plate mill, including charge voltage temperature compensation. Unit is capable of sourcing up to 1350 Watts of power for 10 minutes. This application was based upon a Microchip PIC16C71 microcontroller. All software was written in house, in assembly language.

Electronic Gas Flow Meter Calibrator: Instrumentation hardware and software for industrial gas flow meter calibration, including a constant temperature oven for analogue component stability, 24-bit sigma-delta ADC converter and platinum RTD sensor. This application involved generating complete control software (in C) for communicating with the ADC, oven controller, host PC (RS-232), and gas flow meter (also RS-232).

Multi-line Telephone Interface Module for TMS320Cxx, TMS320C54x, and TMS320C2xx processors. This product was a daughter-module intended for mounting on the customer's existing DSP platform. The design supported multiple module stacking such that up to four complete telephone interfaces could be operated simultaneously. The boards operated by daisy-chaining serial interfaces and operating the DSP's serial port in a TDM mode. This allowed additional codecs to be added to the same serial interface as needed.

Web Browser Telephone: Full-featured telephone containing a RISC (CL-PS7110/7111, ARM710a core) and DSP (TMS320C50/C548) processor architecture with a cold-cathode florescent back-lit LCD display (including back-light inverter), touch screen overlay, Smart Card interface, Mini-Card interface and full keyboard. The LCD in the unit is 320x240, 16 shades of grey. Inter-processor communication was accomplished via a dual-port RAM in the initial version of the telephone, but was later migrated to use the host port interface found on the TMS320C548.

Super-Regenerative Radio Receiver: Microcontroller based superregenerative radio receiver for VHF band radio controlled applications. Used in logging industry. This unit analyses a base-band data stream demodulated by the receiver, and controls the rotational angle of a servo based on received information. This design is based upon an 8-bit ultra low cost microcontroller. The superregenerative receiver was chosen for the reason that no quartz-based crystals or oscillators are required. The lack of crystals is desirable as the application environment is subject to impacts of up to 10,000Gs. An extremely robust mounting technique was developed to allow the board to survive in the application environment.