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Hi
A quick question.
From the datasheet it seems the clock is an input only. Does it mean that with the USI on the MSP430G2230 only I2C slave mode is available?
Thanks,
Giuseppe
Guiseppe,
I think you are referring to this table in the datasheet:
the pin naming is the same as used in the block diagram as follows:
so basically, SCLK line is clock input for the USI I2C module which is optional (you can use internal ACLK, SMACLK, etc.). The I2C lines are SCL and SDA line, so basically the MSP430G2230 can be operated as I2C slave and master.
Leo, it is indeed a bit confusing. In I2C mode, the SCLK signal is the USI module external clock input, while in SPI mode, it is the USI generated SPI clock output (or SPI clock input in slave mode).
But I too don’t know how to describe it better in a single sentence.
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