20-101-1235 Rabbit Semiconductor, 20-101-1235 Datasheet - Page 34
20-101-1235
Manufacturer Part Number
20-101-1235
Description
CORE MODULE RCM5700
Manufacturer
Rabbit Semiconductor
Type
Controllers & Processorsr
Datasheet
1.20-101-1306.pdf
(119 pages)
Specifications of 20-101-1235
Module/board Type
MPU Core Module
Number Of I/os
32
Memory Type
Flash, SRAM
Interface Type
SPI
Operating Voltage
3.3 V
Operating Current
70 mA
Operating Temperature Range
- 40 C to + 85 C
Board Size
50.8 mm x 30.5 mm
Product
Modules
For Use With/related Products
RCM5700
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
316-1153
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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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