W83977F-A Datasheet, PDF (120/182 Pages) Winbond – WINBOND I/O

W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
11. GENERAL PURPOSE I/O
W83977F/G, W83977AF/AG provides 14 Input/Output ports that can be individually configured to
perform a simple basic I/O function or a pre-defined alternate function. Those 14 GP I/O ports are
divided into two groups, the first group contains 8 ports, and the other group contains only 6 ports.
Each port in the first group corresponds to a configuration register in logical device 7. Each port in the
second group corresponds to a configuration register in logical device 8. Users can select those I/O
ports functions by independently programming the configuration registers. Figure 8.1 and 8.2
respectively show the GP I/O port's structure of logical device 7 and device 8. Right after Power-on
reset, those ports perform basic I/O functions.
Figure 11.1
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