GPIO / IOs management

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5.2

Pull activation

Each I/O has a pull-up or a pull-down (fixed). This pull-up/down can be enabled or disabled

through the GPIO_PE register (1 bit per I/O). The reset value for this register is 0x3F,

meaning the pull (up or down) is enabled for all I/Os after reset. Table 6 indicates the

direction of each I/O.

5.3

Shared I/Os at chip level (double bonding)

For I²C peripherals there is a double bonding configuration through the I2C_CONF register,

see Section 10.4: I2C double bonding.

Table 6. IO pull direction

Pad reference

Pull

IO0

Down

IO1

Down

IO2

Up

IO3

Down

IO4

Down

IO5

Down

IO6

Down

IO7

Up

IO8

Up

IO9

Up

IO10

Down