Chipset Chapter: BIOS Settings
Beckhoff New Automation Technology CB3064-xxxx page 103
D0->D3 idle timeout for I2C1 (screen on)
Options: 0..10000
D0->D3 idle timeout for SPI1 (screen off)
Options: 0..10000
D0->D3 idle timeout for SPI1 (screen on)
Options: 0..10000
D0->D3 idle timeout for UART1 (screen off)
Options: 0..10000
D0->D3 idle timeout for UART1 (screen on)
Options: 0..10000