1. No, you should use at least 2. Otherwise, you can't download config file properly.
2. We support i2c burst write, and more details you can check in datasheet. If your smbus i2c is under our spec, should work. (Actually, I don't know what smbus i2c is. SMBUS / I2C are technically different spec. If you support i2c burst, please use it.
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