20-101-1306 Rabbit Semiconductor, 20-101-1306 Datasheet - Page 34

• Manufacturer Part Number: 20-101-1306
• Description: CORE MODULE RCM5750
• Manufacturer: Rabbit Semiconductor
• Type: Serial to Ethernetr

Specifications of 20-101-1306

• Module/board Type: MPU Core Module
• Number Of I/os: 32
• Ethernet Connection Type: 10/100 Base-T
• Memory Type: Flash
• Operating Voltage: 3.3 V
• Operating Current: 70 mA
• Operating Temperature Range: - 40 C to + 85 C
• Board Size: 30 mm x 51 mm x 3 mm
• Product: Modules
• For Use With/related Products: RCM5750
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1183

4.2 Serial Communication
The RCM5700/RCM6700 board does not have any serial level converters directly on the board.
However, an Ethernet or other serial interface may be incorporated on the board the MiniCore is
mounted on. For example, the Serial Communication accessory board in the Deluxe Development
Kit has an RS-232 transceiver, and the Interface Board has Ethernet and USB connections.
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 asyn-
chronous 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 asynchronous
or as a clocked serial port once application development has been completed and the MiniCore is
operating in the Run Mode.
Serial Ports B, 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 Alternate Serial Port B, which uses PD4 and PD5, is used together with the clock on
PB0 for the serial flash on the RCM5750/RCM5760 and RCM6700 family. If you wish to use the
regular Serial Port B I/O pins (PC4 and PC5) as serial I/O pins with the RCM5750/RCM5760 or
RCM6700 family, your application must manage its sharing of Serial Port B so as to avoid any
conflicts with using the onboard serial flash.
Serial Ports E and F can also be configured as SDLC/HDLC serial ports. The IrDA protocol is
also supported in SDLC format by these two ports. Serial Ports E and F must be configured before
they can be used. The following macros show one way to do this.
MiniCore RCM5700/RCM6700 User’s Manual
#define SERE_TXPORT PEDR
#define SERE_RXPORT PEDR
#define SERF_TXPORT PFDR
#define SERF_RXPORT PFDR
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