Running out of I/O space? Need concurrent I/O processing? The PAK-III can help. This easy to use chip augments your Stamp or other microcontroller with 8 I/O pins. The PAK-III is a standard 18-pin IC that can interface with your microcontroller using only 2 pins. And best of all, an I/O operation can proceed without holding up the main processor! Need even more I/O? The PAK-IV (a 28-pin device) adds 16 I/O pins.

Features include:

Robust, speed-independent serial interface -- only 2 pins required

Can connect multiple Stamp Paks to the same 2 pins using an enable pin for each device

Configure each pin for input or output (PAK-III: 8 I/O, PAK-IV: 16 I/O)

Stamp II users can use ShiftIn and ShiftOut

Commands include: IN, OUT, HIGH, LOW, READ, REVERSE, TOGGLE, PULSEIN, PULSEOUT, SHIFTIN, SHIFTOUT, COUNT, PWM, RCTIME, FREQOUT, READ, WRITE, and a time-based RANDOM function

Synchronous operation -- read results when you are ready for them. No blocking and no interrupts required.

Fast 10MHz (PAK-III) or 20MHz (PAK-IV) operation speed (ceramic resonator included)

Bonus: 64 bytes of EEPROM memory (PAK-III), 96 bytes of RAM memory (PAK-IV)

Need this type of functionality for PC programs? Check out the GP3!

The Details

With the PAK-III or PAK-IV you'll receive the IC, a ceramic resonator, a manual, and a software disk with an example Stamp library. The manual explains the communications protocol in detail, the connections required to the chip, and the commands you can use.

Although the PAKs are especially easy to use with the Stamp, you can use them with any microcontroller. Here's some example code for the PIC and the Scenix SX using a PAK-II.

You can download the manuals in PDF format: PAK-III, PAK-IV

Get it Now!

Try a PAK-III for 21 days. If you aren't delighted, just send it back undamaged for a full refund of your purchase price. But once you see your Stamp handling I/O like a champ, you won't want to be without it.

Need volume pricing?

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Add to Cart PAK-III Coprocessor $24.95 each

Add to Cart PAK-IV Coprocessor $29.95 each

Notice: Basic Stamps are a product of Parallax Inc. AWC is in no way affiliated with Parallax.