Parallax Javelin Stamp, Руководство пользователя

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1: Introduction
Javelin Stamp Manual v1.1 • www.javelinstamp.com • Page 5
Java
Interpreter
Address
Latch
32 KB
SRAM
32 KB
EEPROM
Switching
Regulator
IC
Com
Circuit
Switching Regulator
Passive Elements
Serial
Port
Data
Address
Address
Serial Data
Power / Ground / Feedback
Vss
Vin
Vdd
A
d
d
re
s
s
top bottom
Figure 1.2 Javelin Block Diagram
Javelin Stamp Hardware
Table 1.1 shows the Javelin Stamp’s specifications. Note that the onboard voltage regulator
can accept between 6 and 24 V
DC
and output up to 150 mA of current. Since the Javelin
consumes approximately 60 mA, you have 90 mA available for other uses. Keep in mind that
if you are utilizing the full 60 mA of total I/O pin source/sink that only 30 mA is left over for
powering peripheral devices using the Javelin’s Vdd pin. On the other hand, if all the I/O pins
are being used for input, 90 mA can be used drawn from the Javelin’s voltage regulator output
(Vdd) for peripherals. If in doubt, use an external 5 V regulator for your peripherals.
Table 1.1: Javelin Hardware Specifications
Attribute Value
Module Footprint 24-pin DIP module
Package Measurements
(LxWxH)
1.2”x0.6”x0.4” (3.0x1.5x1.0 cm)
Operating Environment 0º - 70º C (32º - 158º F)
Microcontroller Ubicom SX48AC