W83627THF_06 Datasheet, PDF (100/142 Pages) Winbond – Winbond LPC I/O

W83627THF/W83627THG
7.1.8 Logical Device 9 (GPIO Port 3, 4. These two ports are powered by VSB)
CR30 (Default 0x00)
Bit 7 - 2 : Reserved
Bit 1 = 1 Activate GPIO4.
= 0 GPIO4 is inactive.
Bit 0 = 1 Activate GPIO3.
= 0 GPIO3 is inactive.
CRF0 (GP3[7:0] I/O selection register. Default 0xFF)
When set to a '1', respective GPIO port is programmed as an input port.
When set to a '0', respective GPIO port is programmed as an output port.
CRF1 (GP3[7:0] data register. Default 0x00)
If a port is programmed to be an output port, then its respective bit can be read/written.
If a port is programmed to be an input port, then its respective bit can only be read.
CRF2 (GP3[7:0] inversion register. Default 0x00)
When set to a '1', the incoming/outgoing port value is inverted.
When set to a '0', the incoming/outgoing port value is the same as in data register.
CRF3 (SUSLED mode register. Default 0x00)
Bit 7-6 : Select Suspend LED mode
= 00 Suspend LED pin is drove low.
= 01 Suspend LED pin is tri-stated.
= 10 Suspend LED pin is a 1Hz toggle pulse with 50 duty cycle.
= 11 Suspend LED pin is a 1/4Hz toggle pulse with 50 duty cycle.
This mode selection bit 7-6 keep its settings until VSB power loss.
Bit 5 - 0 : Reserved.
CRF4 (GP4[7:0] I/O selection register. Default 0xFF)
When set to a '1', respective GPIO port is programmed as an input port.
When set to a '0', respective GPIO port is programmed as an output port.
CRF5 (GP4[7:0] data register. Default 0x00)
If a port is programmed to be an output port, then its respective bit can be read/written.
If a port is programmed to be an input port, then its respective bit can only be read.
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Publication Release Date: September 26, 2006
Revision 1.2