ADD7232
Reference Board for the ADD1000A
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Overview
The Power Line Communication (PLC) technology provides a low cost and easy way to connect and to control devices in the industrial, or domestic, environment. ADD1000A is the System on Chip (SoC) solution of Advanced Digital Design to easily use PLC technology in applications such as Home and Industrial Automation or Automatic Meter Reading (AMR) systems. ADD1000A includes most of the components of a full PLC node: an enhanced 8051 microcontroller, a Medium Access Controller (MAC) and a Modem circuit compatible with the EHS Power Line medium specifications. It is designed to be used by OEM and provides a low cost and small size solution for narrow band power line communications.
ADD7232 board is the reference prototyping board to develop and prototyping new devices using the Power Line Communication (PLC) technology of Advanced Digital Design and its System on Chip (SoC) solutions.
ADD7232 reference board includes an ADD1000A chip, a FLASH memory (512Kx8bit), a RAM memory (128Kx8bit), 22 general purpose I/O and a serial RS232 link. The microcontroller included in the system is an 8051 compatible core the ADD8051C12A, with 256 bytes of internal RAM memory, two timers, five interrupt sources (RI/TI, T0, T1, INT0, INT1) and the Standard Serial Interface. The program memory of 8051 microcontroller is stored in an external 512kbytes FLASH chip. The program of the 8051 can be reprogrammed by the user using a software application through a RS232 link. The rest of the flash memory can be used by applications to write and read non volatile information, such as IP address, unique Ethernet address, reference control levels... After the power up, the reset process of ADD8051C12A transfers the program from the external flash to the top half of the external 128kbytes RAM and uses the bottom half for the data map. The UART lines of microcontroller are directly available.
To program the ADD7232 flash memory, ADD7281 device is normally used, but other device could be designed for this. The following should be the diagram:
ADD7232 needs a power supply 3.3VDC 1W. Programming jumper must be set. A RS232 transceiver, like ADM3202A, converts from TTL level to RS232 level.
To load the program, launch ADD6030 application in a computer. See APN100 How to Program the ADD7232.pdf to solve any doubt on using this application.