12.4 Signal Description
| Signal Name | Type | Description | 
|---|---|---|
| GCLK_IO[7:0](1,2,3) | Digital I/O | 
                             Clock source for Generators when input Generic Clock signal when output  | 
Note: 
            
- One signal can be mapped on several pins.
 - Each GCLK_IO[x] signal is connected to the related Generic Clock Generator x, for x in [7:0].
 - There is no GCLK_IO8 input or output for the Generic Clock Generator 8.
 
