STLC2500A

Digital interfaces

33/37

7.4

GPIOs

The STLC2500A has 4 GPIO pins. They are fully programmable via specific HCI

commands. They can be configured as input, output, interrupt with asynchronous or

synchronous edge or level detection and/or wake-up.

Also other functions are multiplexed on the GPIO pins.

The alternative functions are:

–

WLAN co-existence control

–

I2C interface

–

PCM synchronization

–GPIOs

Some functions are mutually exclusive, as per

Table 22.

7.5

I2C interface

The I2C interface is used to access I2C peripherals.

The interface is a fast master I2C; it has full control of the interface at all times. I2C slave

functionality is not supported.

Table 22.

GPIO multiplexing - Multiplexed GPIOs

1.

See also

Table 18

I2C

PCM

Order 1 (Order 2)

WLAN 1

I2C clock

[I2C or GPIO]

GPIO 0 (GPIO 3)

WLAN 2

I2C data

[I2C or GPIO]

GPIO 1 (GPIO 2)

WLAN 3

[PCM or GPIO]

PCM sync 1

GPIO 2 (GPIO 1)

WLAN 4

[PCM or GPIO]

PCM sync 2

GPIO 3 (GPIO 0)