101-1173 Rabbit Semiconductor, 101-1173 Datasheet - Page 112
101-1173
Manufacturer Part Number
101-1173
Description
RCM4400W DEV KIT UNIVERSAL
Manufacturer
Rabbit Semiconductor
Series
RCM4400W RabbitCore™r
Type
Wi-Fi / 802.11.br
Datasheet
1.20-101-1202.pdf
(126 pages)
Specifications of 101-1173
Frequency
2.4GHz
Wireless Frequency
58.98 MHz
For Use With/related Products
RCM4400W
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1133
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B.4.3 Analog Features
The Prototyping Board has typical support circuitry installed to complement the ADS7870
A/D converter chip, which is available on other RabbitCore modules based on the Rabbit
4000 microprocessor, but is not installed on the RCM4400W. Since the RCM4400W Rabbit-
Core module does not have the ADS7870 A/D converter chip, the Prototyping Board will
not provide A/D converter capability with the RCM4400W RabbitCore module.
B.4.4 Serial Communication
The Prototyping Board allows you to access the serial ports from the RCM4400W module.
Table B-3 summarizes the configuration options.
Serial Ports E and F may be used as serial ports, or the corresponding pins at header loca-
tion J2 may be used as parallel ports.
B.4.4.1 RS-232
RS-232 serial communication on header J4 on both Prototyping Boards is supported by an
RS-232 transceiver installed at U3. This transceiver provides the voltage output, slew rate,
and input voltage immunity required to meet the RS-232 serial communication protocol.
Basically, the chip translates the Rabbit 4000’s signals to RS-232 signal levels. Note that
the polarity is reversed in an RS-232 circuit so that a +3.3 V output becomes approxi-
mately -10 V and 0 V is output as +10 V. The RS-232 transceiver also provides the proper
line loading for reliable communication.
RS-232 can be used effectively at the RCM4400W module’s maximum baud rate for dis-
tances of up to 15 m.
106
Serial Port
A
D
B
C
E
F
Table B-3. Prototyping Board Serial Port Configurations
Header
J2, J4
J2, J4
J2
J2
J2
J2
Programming Port
Default Use
Serial Flash
RS-232
RS-232
—
—
Alternate Use
RabbitCore RCM4400W
RS-232
RS-232
—
—
—
—
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