AN495

Rev. 0.2

9

4.3. Get GPIO Values

Report ID: 0x03

Direction: Feature Request In

If a pin is configured as a GPIO input pin, the corresponding Latch Value bit represents the input value. If a pin is

configured as a GPIO output pin, the corresponding Latch Value bit represents the logic level driven on the pin.

GPIO0_TXT corresponds to bit zero (the least significant bit), and GPIO7_CLK corresponds to bit seven (the most

significant bit).

4.4. Set GPIO Values

Report ID: 0x04

Direction: Feature Request Out

Set GPIO Values sets the values for GPIO pins.

The desired value for the pin is configured in Latch Value. To drive a “1” on an output pin, the corresponding bit

should be set to “1”. To drive a “0” on an output pin, the corresponding bit should be set to “0”.

The Report sets new values only for output pins that have a “1” in the corresponding bit position in Latch Mask. If

the corresponding bit in Latch Mask is set to “0”, a new pin value will not be set, even if the pin is configured as an

output pin.

The Report does not affect any pins that are not configured as outputs.

4.5. Get Version Information

Report ID: 0x05

Direction: Feature Request In

Part Number indicates the device part number. The CP2112 returns 0x0C.

Device Version is the version of the device. This value is not programmable over the HID interface.

Name

Offset

Size

Value

Description

Latch Value

1

2

*

Current latch values

Name

Offset

Size

Value

Description

Latch Value

1

1

*

Latch value

Latch Mask

2

1

*

Pin to set to new latch value

Name

Offset

Size

Value

Description

Part Number

1

1

0x0C

Device part number

Device Version

2

1

Varies