set_output_delay -clock "i2c_scl_clk" -add_delay -min [expr (60 + 12) * -1] [get_ports SDA] -clock_fall [expr (60 + 12) * -1] 60 à (0.5 * SCL tr) contribution critical case à (0.5 * 120) 12 à SDA tr à ...
The best part of I2C is that it is a bus that is available just about anywhere, covering a vast ecosystem of devices that offer it as a hardware-defined interface, while being uncomplicated enough ...
The PCF8574 is an I2C GPIO expander that does simple transfers. It has eight GPIO pins, and it only does simple transfers. How does that work, given it does both input and output? Well ...
The GPIO cell can be configured as input, output or open-drain with an optional internal 60K ... 3.3V LVDS TX & RX cells, along with 3.3V OTP programming, 3.3V I2C open drain and analog cells ...
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