1. Ashley Callaway Pat Doherty Nikeshia Ebron Leo Romanovsky
ECE Grande
Theory of Operation Hardware Design
Ashley Callaway
Pat Doherty
Nikeshia Ebron
Leo Romanovsky

2. Overview Theory of Operation Hardware Components Block Diagram
Schematic

3. Theory of Operation - 1 Microcontrollers RFID Reader LCD Screens
Operating frequency is 16MHz
Satisfies computational requirements
Conserves more power than 32MHz clock
RFID Reader
Operating voltage is 5V
TTL serial interface (2400 baud)
Level shifter
Requires 3.3V and 5V
LCD Screens
Operating voltage is 3.3V
90 mA current draw
- Don’t forget to mention that the 90mA current draw is for EACH LCD screen

4. Theory of Operation - 2 User input buttons Ethernet port Power supply
Generic pushbutton switches
Ethernet port
Magnets for analog signal are present within jack itself
Power supply
9V wall wart
3.3V linear regulator
5.5V linear regulator
0.5 to 1 Amp
- For the power supply, we might want more than 1 Amp of current coming out of the power supply

5. Hardware – Master Microcontroller
FreeScale 9S12NE64
General Purpose I/O
1 – RFID Reader
4 – Slave Selects
SCI
Exclusively devoted to RFID
SPI
Master to Slave microcontroller communication
TIM (tentative)
May aid in controlling the flow of game
- WILL want to use the TIM module…so we can keep track of games, statistics, time stamps, count down until start of game, etc….

6. Hardware – Slave Microcontrollers
FreeScale 9S12GC32
One slave micro per player station
17 pins/micro
General Purpose I/O
14 pins – Parallel LCD communication
3 pins – User input buttons
SPI
Master-Slave microcontroller communication
Option 1: Using an individual crystal for each slave micro will change the power
Option 2: using a buffer from the main crystal to the slave micros

7. PARTS CHANGE - LCD 128 x 64 Graphic OLED Module
Parallel 8-bit interface
3.3V power supply and logic

8. Block Diagram
DIAGRAM
BLOCK

9. Schematic
Coming Soon … 