IDT General Purpose I/O
PES16T4G2 User Manual
4 - 2
January 28, 2013
Notes
GPIO Pin Configured as an Input
When configured as an input in the GPIOCFG register and as a GPIO function in the GPIOFUNC
register, the GPIO pin is sampled and registered in the GPIOD register. The value of the input pin can be
determined at any time by reading the GPIOD register. Note that the value in this register corresponds to
the value of the pin irrespective of whether the pin is configured as a GPIO input, GPIO output, or alternate
function.
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.
Summary of Contents for 89HPES16T4G2
Page 10: ...IDT Table of Contents PES16T4G2 User Manual iv January 28 2013 Notes...
Page 12: ...IDT List of Tables PES16T4G2 User Manual vi January 28 2013 Notes...
Page 14: ...IDT List of Figures PES16T4G2 User Manual viii January 28 2013 Notes...
Page 18: ...IDT Register List PES16T4G2 User Manual xii January 28 2013 Notes...
Page 30: ...IDT PES16T4G2 Device Overview PES16T4G2 User Manual 1 12 January 28 2013 Notes...
Page 48: ...IDT Link Operation PES16T4G2 User Manual 3 10 January 28 2013 Notes...
Page 68: ...IDT SMBus Interfaces PES16T4G2 User Manual 5 18 January 28 2013 Notes...
Page 72: ...IDT Power Management PES16T4G2 User Manual 6 4 January 28 2013 Notes...
Page 140: ...IDT Configuration Registers PES16T4G2 User Manual 8 62 January 28 2013 Notes...