Not So Deep Not So Deep BlueBlue

The original Deep Blue

•LED chess board

•Track movements of all pieces

•Show possible moves

•Track game time

•Detect piece movement•Magnets/Reed switches

Design ConstraintsDesign Constraints•Drive 64 x 3 LEDs with PWM

•Sample Inputs from 64 SPST Reed switches

•Have RS-232 communication for development/debugging

•Sample standard logic signals from touch IC

•Accurately track time for game timing

Design ConstraintsDesign Constraints•Drive 64 x 3 LEDs with PWM

I2C LED Drivers

•Sample Inputs from 64 SPST Reed switches

SPI I/O Expander with 8x8 switch matrix

•Have RS-232 communication for development/debugging

UART

•Sample standard logic signals from touch IC

At least 8 extra GPIO pins

•Accurately track time for game timing

Real Time clock or timer channel

• Used parametric table

• Narrowed to ATmega325

and ATmega64

Device Flash (Kbytes)

SRAM (Bytes)

Max I/O Pins

10-bit A/D Channels

16-bit Timers

8-bit Timer

PWM RTC Self Program Memory

SPI TWI UART

ATmega325 32 2048 54 8 1 2 4 Yes Yes 1+USI USI 1ATmega64 64 4096 54 8 2 2 8 Yes Yes 1 Yes 2

• Choose ATmega64 More timer channels More memory Pin and feature compatible with ATmega128