JS1-IC Parallax Inc, JS1-IC Datasheet - Page 6

• Manufacturer Part Number: JS1-IC
• Description: MODULE BASIC STAMP JAVELIN
• Manufacturer: Parallax Inc

Specifications of JS1-IC

• Lead Free Status: Contains lead
• Module/board Type: Javelin Stamp Module
• Product: Microcontroller Basic Stamps
• Core Processor: SX48AC
• Operating Supply Voltage: 5 V
• Board Size: 31.5 mm x 15.24 mm x 11.43 mm
• For Use With/related Products: BASIC Stamp®
• For Use With: 550-00019 - BOARD DEMO JAVELIN STAMP27237 - KIT JAVELINE STAMP STARTER
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q1349003

Javelin Stamp Manual v1.0 Errata v1.3
Page iv Javelin Stamp Errata www.parallaxinc.com
Problem
Explaination
Solution
Labeled incorrectly/Elaboration
The title “final static boolean invert"
Should read:
final static boolean dontInvert
The explaination for dontInvert has been expanded. The new explaination is as
follows:
final static boolean dontInvert – selects non-inverted mode. Non-inverted
mode allows you to connect the Javelin Stamp to an RS232 device. To do this you will need
to boost the Javelin’s TTL signal (0/5 V) to 12 V as required by the RS232 specifications.
This can be accomplished by using a MAX232 or the SP237 Uart transceivers. Either of
these transceivers will invert the TTL signal as it boosts them to 12 V, which is why we
use the non-inverted mode. The Javelin Stamp Demo board has an SP237 that you can use
by connecting the I/O pins of the Javelin Stamp to the 8-socket COM header (X4) on the
Demo Board (See Chapter 4, figure 4.8b). The figure below shows you this as a 2-wire
connection, without flow control.
Important
Not-Inverted
Figure
Page 188 Uart “final static boolean invert”
Uart
The pins on the male/female DB-9 connectors are different. They are
mirror images of each other; care is needed when making these
connections that you are connecting to the appropriate pin.
Vss
10
11
12
Javelin Stamp
1
4
2
3
5
6
7
8
9
1
24
23
22
21
20
19
18
17
16
15
14
13
(no flow control)
Transmitter Uart
(no flow control)
Receiver Uart
SP 237 etc.
Max 232
Vss
5
9
4
8
3
7
2
6
1
DB9 Pin 3
DB9 Pin 2