topic MC56F82748 I2C pull up resistor in Digital Signal Controllers

MC56F82748 I2C pull up resistor

EngHuiPeng — Thu, 14 Jan 2016 09:32:32 GMT

Is there any recommended pull up resistor for SCL and SDA lines of the I2C peripherals. This is for MC56F82748(Anguilla Silver)

xiangjun_rong — Fri, 15 Jan 2016 03:42:22 GMT

Hi, HuiPeng,

I think 4.7K ohm pull-up resistor is okay for the open drain IIC pins: SCL/SDA for MC56F82xxx.

Xiangjun Rong

Stano — Fri, 15 Jan 2016 15:05:16 GMT

Hi HuiPeng,

for the 400pF max capacitance and 100kHz max communication speed the max pull-up resistor is 4k7. I suggest you to use 2k7 or 3k3 as pull-ups.

BR,

Stano.