Parallax BASIC Stamp 2e, Programming Manual

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1: Introduction to the BASIC Stamps
BASIC Stamp Programming Manual 2.0c
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Page 9
The BASIC Stamp 1 is available in the above three physical packages. The
BASIC Stamp 1 Rev. D (simply called the Rev. D), see Figure 1.1, includes
prototyping area suitable for soldering electronic components. The BS1-IC
(Figure 1.2) uses surface mount components to fit in a small 14-pin SIP
package. The OEMBS1 (Figure 1.3) features an easier-to-trace layout
meant to aid customers who wish to integrate the BASIC Stamp 1 circuit
directly into their design (as a lower-cost solution). The OEMBS1 is
available in either an assembled form or a kit form. All three packages are
functionally equivalent with the exception that the Rev. D does not have
an available reset pin.
Pin Name Description
1 VIN
Unregulated power in: accepts 5.5 - 15 VDC (6-40 VDC on
BS1-IC rev. b), which is then internally regulated to 5 volts. May
be left unconnected if 5 volts is applied to the VDD (+5V) pin.
2 VSS
System ground: connects to PC parallel port pin 25 (GND) for
programming.
3 PCO
PC Out: connects to PC parallel port pin 11 (BUSY) for
programming.
4 PCI PC In: connects to PC parallel port pin 2 (D0) for programming.
5 VDD
5-volt DC input/output: (Also 5V) if an unregulated voltage
is applied to the VIN pin, then this pin will output 5 volts. If no
voltage is applied to the VIN pin, then a regulated voltage
between 4.5V and 5.5V should be applied to this pin.
6 RES
Reset input/output: goes low when power supply is less than
approximately 4.2 volts, causing the BASIC Stamp to reset. Can
be driven low to force a reset. This pin is internally pulled high
and may be left disconnected if not needed. Do not drive high.
7-14 P0-P7
General-purpose I/O pins: each can sink 25 mA and source 20
mA. However, the total of all pins should not exceed 50 mA (sink)
and 40 mA (source).
See the "BASIC Stamp Programming Connections" section, below, for
more information on the required programming connections between the
PC and the BASIC Stamp.
Table 1.1: BASIC Stamp 1 Pin
Descriptions.