Does somebody ever used a SHT15 humidity sensor (http://www.sparkfun.com/products/8257) ? It is has a 2 wire interface but not compatible with i2c standard. The SCK line is pulled down on the breakout board. The datasheet (http://www.sparkfun.com/datasheets/Sensors/Datasheet-humidity-sensor-SHT1x.pdf) says it can be used on the i2c bus, just switching the protocol.
How can I implement this protocol (without using a microcontroler) ? How to synchronize the DATA and SCK lines (I'm using an Overo with Tobi) ?