参数资料
型号: 101-1226
厂商: Rabbit Semiconductor
文件页数: 96/168页
文件大小: 0K
描述: RCM3900 DEV KIT UNIVERSAL
标准包装: 1
系列: RabbitCore 3900
类型: MPU 模块
适用于相关产品: RCM3900
所含物品: RabbitCore 模块、开发板、交流适配器、缆线和 Dynamic C? 光盘
其它名称: 316-1137
RabbitCore RCM3900 User’s Manual
33
4.2 Serial Communication
The RCM3900 does not have any serial protocol-level transceivers directly on the board.
However, a serial interface may be incorporated into the board the RCM3900 is mounted
on. For example, the Prototyping Board has RS-232 and RS-485 transceiver chips.
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 the RCM3900 has been programmed and is oper-
ating in the Run Mode.
Serial Port B is used as the SPI interface for the microSD Card, and is not available for
other 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.
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.
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