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Figure 2. I2C2 double bonding

Note:

In serial mode 0, it is recommended to select the open-drain I/O configuration

(I2C_CONFIG[0]) = ‘1’ and push-pull I/Os configuration (I2C_CONFIG[0] = ‘0’) for the other

mode.

10.4.2

I2C1

The second bit of the I2C_CONF register (see Brain reference manual, GPIO chapter) is

used to select between an open-drain and a push-pull I/O for the I2C1 SDA line.

I2C_CONF[1] = ‘1’ selects the open-drain I/O while I2C_CONF[1] = ‘0’ selects the push-pull

I/O. Once this configuration is selected, the serial mode 0 (see Section 5.1.1: I/O mode) has

to be selected for IO2 and IO3 to access the I2C1.

Figure 3. I2C1M double bonding

Note:

In serial mode 0, it is recommended to select the open-drain I/O configuration

(I2C_CONFIG[1]) = ‘1’ and the push-pull I/Os configuration (I2C_CONFIG[1] = ‘0’) for the

other mode.