PAK-III Datasheet, PDF (3/14 Pages) List of Unclassifed Manufacturers – Using the PAK-III I/O Coprocessor

Overview
The Stamp Pak III is an 8-bit I/O coprocessor with a versatile interface that makes it easy
to interface it with a variety of microcontrollers including the Basic Stamp from Parallax.
However, you can easily interface the Pak III with practically any modern
microprocessor. Here are some of the Pak III's major features:
• Robust, speed independent serial interface
• Uses as few as 2 pins to connect to the host
• Can connect multiple devices to the same 2 pins with one additional pin per device
• Works with Stamp II's ShiftOut and ShiftIn commands
• Synchronous operation – read results when you are ready for them
• Adds 8-bits of general-purpose digital I/O pins
• 64 bytes of EEPROM storage
• Advanced I/O features (PWM, Count, Pulse I/O, etc.)
• Easy to use
The Pak III is a standard 18-pin IC. In order to operate it must have a regulated supply of
5V and connection to a clock element. The Stamp Pak III includes a 10Mhz ceramic
resonator that you can use to clock the chip.
Other than the power and clock connections, the Pak III requires at least two wires to
connect between your microcontroller (the host) and itself. Depending on the host's
capabilities and your application, you may want to use more pins for I/O (up to 5 pins.
1
SIN
18
BUSY/MODE
2
SOUT
17
ENABLE/BUSY
3
CLK
16
RES2
4
RESET
15
RES1
5
Vss
14
Vdd
6
B0
PAK-III
13
B7
7
B1
12
B6
8
B2
11
B5
9
B3
10
B4