What are the different serial port communication options available when using ADE ICs for meters?
ADE ICs offer as much as 4 different serial port communication opportunities. They are: I2C, SPI, UART and High Speed Data Capture Port (HSDC). Selection of which serial port interface to use depends on the application purpose and requirements. I2C requires just 2 pins; however it is expensive to isolate and cannot address devices individually. It is available in ADE7953, ADE7878 and ADE7880. SPI provides a faster communication and offers a chip select pin for communicating with multiple devices. The downside of this option is that as it uses four wires, there is a lot of isolation to be done. SPI ports can be found in most ADE ICs such as ADE7953, ADE5569, ADE7518, ADE5169, ADE7116, ADE7156, ADE7166, ADE7169, ADE7569, ADE7566, ADE7763, ADE7753 and ADE7759. UART is just used in ADE7953. There are just two unidirectional pins and hence isolation becomes easier but it is fairly slow. HSDC port, which is used in ADE7878 and ADE7880, is a dedicated high speed interface that can be used in conjunction with I2C interface to access ADC outputs and to obtain real-time power information.
regarding the I2C w/r addresses (0x70/0x71)
the ADE7878 was a number of reserved registers, does one of those registers hold an address that can be changed?
For the ADE7878 there is no register to allow changing the address for I2C, that is fixed for the part.
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