101-1173 Rabbit Semiconductor, 101-1173 Datasheet - Page 42
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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4.2 Serial Communication
The RCM4400W module does not have any serial driver or receiver chips directly on the
board. However, a serial interface may be incorporated on the board the RCM4400W is
mounted on. For example, the Prototyping Board has an RS-232 transceiver chip.
4.2.1 Serial Ports
There are six serial ports designated as Serial Ports A, B, C, D, E, and F. All six serial
ports can operate in an asynchronous mode up to the baud rate of the system clock divided
by 8. An asynchronous port can handle 7 or 8 data bits. A 9th bit address scheme, where
an additional bit is sent to mark the first byte of a message, is also supported.
Serial Port A is normally used as a programming port, but may be used either as an asyn-
chronous or as a clocked serial port once application development has been completed and
the RCM4400W is operating in the Run Mode.
Serial Port B is shared with the serial flash, and is set up as a clocked serial port. PB0
provides the SCLKB output to the serial flash. Note that the serial flash is used to support
the FPGA chip in the Wi-Fi circuit, and is not available for customer use.
Serial Ports C and D can also be operated in the clocked serial mode. In this mode, a clock
line synchronously clocks the data in or out. Either of the two communicating devices can
supply the clock. Note that PD2 and PD0 provide the SCLKC and SCLKD outputs auto-
matically when Serial Ports C and D are set up as clocked serial ports.
Serial Ports E and F can also be configured as SDLC/HDLC serial ports. The IrDA proto-
col is also supported in SDLC format by these two ports. Serial Ports E and F must be con-
figured before they can be used. The sample program
in the
IOCONFIG_SWITCHECHO.C
Dynamic C
folder shows how to configure Serial Ports E
SAMPLES\RCM4400W\SERIAL
and F.
36
RabbitCore RCM4400W
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