Communication Protocols — question 3 of 10
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Use the standard approximation t_rise ~= 0.8473 * R_pullup * C_bus for an RC-charged open-drain line.
You're sizing the pull-up resistors for a standard-mode I2C bus (100 kHz) with a total bus capacitance of 400 pF and a 3.3V supply. The I2C spec requires the rise time on SDA/SCL to be under 1000 ns. What's the largest pull-up resistance you can use while still meeting that rise time spec?
This one resolves to a number. Give the value in the field below and your reasoning in the box — the number is checked exactly, by arithmetic.