Intel N2820 FH8065301616603 データシート
製品コード
FH8065301616603
Datasheet
1263
PCU – iLB – GPIO
29.3
Use
Each GPIO has six registers that control how it is used, or report its status:
•
Use Select
•
I/O Select
•
GPIO Level
•
Trigger Positive Edge
•
Trigger Negative Edge
•
Trigger Status
The Use Select register selects a GPIO pin as a GPIO, or leaves it as its programmed
function. This register must be set for all other registers to affect the GPIO.
function. This register must be set for all other registers to affect the GPIO.
The I/O Select register determines the direction of the GPIO.
The Trigger Positive Edge and Trigger Negative Edge registers enable general purpose
events on a rising and falling edge respectively. This only applies to GPIOs set as input.
events on a rising and falling edge respectively. This only applies to GPIOs set as input.
The Trigger Status register is used by software to determine if the GPIO triggered a
GPE. This only applies to GPIOs set as input and with one or both of the Trigger modes
enabled.
GPE. This only applies to GPIOs set as input and with one or both of the Trigger modes
enabled.
Additionally, there is one additional register for each S5 GPIO:
•
Wake Enable
This register allows S5 GPIOs to trigger a wake event based on the Trigger registers’
settings.
settings.