參數(shù)資料
型號： 20-101-1028
廠商： Rabbit Semiconductor
文件頁數(shù)： 100/172頁
文件大?。?/td> 0K
描述： MODULE RABBITCORE RCM3750
標準包裝： 1
系列： RabbitCore®
模塊/板類型： MPU 核心模塊
適用于相關(guān)產(chǎn)品： RCM3750
產(chǎn)品目錄頁面： 619 (CN2011-ZH PDF)
其它名稱： 316-1110
User’s Manual
27
4.2 Serial Communication
The RCM3750 board does not have any serial transceivers directly on the board. How-
ever, a serial interface may be incorporated on the board the RCM3750 is mounted on. For
example, the Prototyping Board has RS-232, RS-485 and IrDA transceiver chips.
4.2.1 Serial Ports
There are five serial ports designated as Serial Ports A, C, D, E, and F. All five 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 RCM3750 is operating in the Run Mode.
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.
Serial Ports E and F can also be configured as HDLC serial ports. The IrDA protocol is
also supported in SDLC format by these two ports.
Serial Port F shares its pins with Serial Ports C and D on header J1, as shown in Figure 7.
The selection of port(s) depends on your need for two clocked serial ports (Serial Ports C
and D) vs. a second HDLC serial port (Serial Port F).
Figure 7. RCM3750 Serial Ports C, D, and F
The serial ports used are selected with the serXOpen function call, where X is the serial
port (C, D, or F). Remember that RxC and RxD on Serial Ports C and D cannot be used if
Serial Port F is being used
TXC
RXC
RXD
TXD
TXF
RXF
PC2
PC3
PC0
PC1
PG2
PG3
J1: 23
J1: 24
J1: 21
J1: 22
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