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Basic Stamp

BS2-IC

BX24

PIC

16F877

68HC912B32

TechArts module

68HC11E1

Tcomp 4.5 board

Clock Speed

20 MHz

4K LOC/sec

? MHz

65K LOC/sec

20 MHz

8 MHz

8 MHz

EEPROM/Flash

2K

500 LOC

32K

8000 LOC

8K

32K

1/2K

RAM

32

400

368

1024

32K

Mem Expansion?

no

no

 

64K RAM

64K

Digital I/O

16 general purpose I/O

16 (less those used for analog)

33 (less those used below?)

63 (less those used below)

21 (less those used below)

Source/Sink current

20/25 ma

10/20 ma

25/25 ma

25/25 ma

?/25 ma

Analog input

For resistive sensors 16bit

8 chan

8 chan 10 bit

8 chan 8 bit

8 chan 8 bit

Inp/Out capt

Input cap

 

yes

8: inpt cap or out comp

4 inpt cap

5 output comp

Pulse accum

Yes

 

no

Yes

Yes

PWM channels

Yes

2

2

4 8bit/2 16bit

4 16 bit

Serial interface

RS232 (up to 16)

RS232/SPI or parallel

RS232? External components?

RS232/SPI

RS232/SPI

Real Time Intr

no

Yes??

Yes

Yes

Yes

Other interrupts

no

 

14,

3 timers:

1x16bit

2x 8bit

1 WDT(COP)

2 external

8 timer chans

ATD

2 pulse accum

COP

2 external

8 timer chans

2 pulse accum

COP

Power req’mt

5vdc or >8

7 ma.

4.8 to 15 vdc

20 ma.

5 vdc +/- 10%

2 ma.

5 vdc or > 8

25 ma.

5 vdc

?

Programming

Built-in Pbasic interpretor.

 

Assembler

Basic

C

Freeware:

Assembler

Sbasic

Gnu C

Costware:

Imagecraft C

Etc.

Freeware:

Assembler

Sbasic

Tiny4th

MaxForth

Costware:

Interactive C

Imagecraft C

Floating point math?

No

Yes

Yes

Yes..with Imagecraft C

Yes, with Max-Forth & Img C

Other features

 

Trig,log,exp,sqrt functions.

Networks

Multitasking

RS485

Supports

Multidrop

I^2C

Card inserts into standard protoboard

Board has 2 H bridge drivers for robot wheels

Price

$50.

$100 starter kit

$50 chip

$12. Build programmer for $6

$120 starter kit

$99 module

$49 64k RAM

$135