DS1307 on i2cfast

BCJKiwi

Senior Member
While developing my current project, the i2c bus speed was set at i2cfast_8 on a 28x1 running at 8Mhz. The DS1307 can be programmed and read successfully and repeatedly.

All Maxim documentation indicates;
"The DS1307 operates in the standard mode (100kHz) only".

PICAXE manual states for hi2csetup - master mode;
Speed of the i2c bus can be selected by using one of the three keywords i2cfast, i2cmedium or i2cslow (1MHz, 400kHz or 100kHz). The internal slew rate control of the microcontroller is automatically enabled when required.

Any comment on the stability of running the DS1307 at i2cfast would be appreciated.
 
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