Gpio Pin Configured As An Output; Gpio Pin Configured As An Alternate Function - Renesas IDT 89HPES4T4 User Manual

IDT General Purpose Inputs/Outputs
Notes
PES4T4 User Manual

GPIO Pin Configured as an Output

When configured as an output in the GPIOCFG register and as a GPIO function in the GPIOFUNC
register, the value in the corresponding bit position of the GPIOD register is driven on the pin. System
designers should treat the GPIO outputs as asynchronous outputs. The actual value of the output pin can
be determined by reading the GPIOD register.

GPIO Pin Configured as an Alternate Function

When configured as an alternate function in the GPIOFUNC register, the pin behaves as described by
the section associated with that function. The value of the alternate function pin can be determined at any
time by reading the GPIOD register.
5 - 2 February 1, 2011