Critical Design Review Ka Hing Chan EE 396 Project November 17, 2006

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Critical Design ReviewKa Hing ChanEE 396
ProjectNovember 17, 2006
USB iTASK Part 1
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Overview

• To design a USB device to read in different USB
  devices, pass data packets to the PC, and send
  data packets from PC to PC.

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Overview
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Module

• Concentration is only on getting the
  microprocessor and the USB to communicate with
  the PC.

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Circuit
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MAX6349TL Regulator

• 3.3V Regulator
• PINS
• 1 IN
• 2 GND
• 4 RESET
• 5 SET
• 6 OUT

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USB MAXIM MAX3421E

• USB Peripheral/Host Controller with 26MHz SPI
  Interface
• Complies with USB Specification Revision 2.0
• Interrupt Output Pin
• Allows Polled
• Interrupt-Driven SPI Interface

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MAXIM MAX3421E PINS
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MAX3421E - Diagram
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MAX3421E SPI COMMAND
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ET-ARM7 STAMP

• 32-Bit ARM7TDMI-S
• 3.3V Power Supply
• SPI INTERFACE
• PORTS
• Dont know yet

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ET-ARM7 STAMP
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Programming Software

• KEIL C Compiler
• MircoVision3 V3.20a
• Started Using the evaluation software that came
  with the processor
• Able to download the demo program onto the
  processor.

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To be Done

• Circuit layout
• Using the ARM START to do the circuit
• Understanding the functions of USB and ET-ARM7
• PORTS
• SPI Registers
• Programming
• Debugging

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Potential Problems

• Not understanding the microprocessor
• Programming the right ports
• SPI Interface
• Not understanding the USB microprocessor
• Sending/Receiving data packets from
  microprocessor
• HID protocols
• Sending and reading data packets
• Not be able to finish it on time

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Timeline
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Timeline

• Programming ARM7
• Understanding PORTS first
• Slowly Program the ARM7 with SPI
• Hardware
• Neil is getting the soldiering oven kit
• Soldier the chip surface mounting

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Questions?
USB iTASK Part 1

• Visit my website at
• http//www2.hawaii.edu/kahing
• Thank You!!!

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