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Basic Stamp BS2-IC |
BX24 |
PIC 16F877 |
68HC912B32 TechArts module |
68HC11E1 Tcomp 4.5 board |
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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 |
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RAM |
32 |
400 |
368 |
1024 |
32K |
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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) |
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Source/Sink current |
20/25 ma |
10/20 ma |
25/25 ma |
25/25 ma |
?/25 ma |
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Analog input |
For resistive sensors 16bit |
8 chan |
8 chan 10 bit |
8 chan 8 bit |
8 chan 8 bit |
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Inp/Out capt |
Input cap |
|
yes |
8: inpt cap or out comp |
4 inpt cap 5 output comp |
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Pulse accum |
Yes |
|
no |
Yes |
Yes |
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PWM channels |
Yes |
2 |
2 |
4 8bit/2 16bit |
4 16 bit |
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Serial interface |
RS232 (up to 16) |
RS232/SPI or parallel |
RS232? External components? |
RS232/SPI |
RS232/SPI |
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Real Time Intr |
no |
Yes?? |
Yes |
Yes |
Yes |
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Other interrupts |
no |
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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 |
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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 ? |
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Programming |
Built-in Pbasic interpretor. |
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Assembler Basic C |
Freeware: Assembler Sbasic Gnu C Costware: Imagecraft C Etc. |
Freeware: Assembler Sbasic Tiny4th MaxForth Costware: Interactive C Imagecraft C |
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Floating point math? |
No |
Yes |
Yes |
Yes..with Imagecraft C |
Yes, with Max-Forth & Img C |
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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 |