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W83977EF-AW Datasheet(PDF) 76 Page - Winbond |
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W83977EF-AW Datasheet(HTML) 76 Page - Winbond |
76 / 142 page W83977EF-AW/W83977EG-AW -74- 9. GENERAL PURPOSE I/O W83977EF/EG 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 three groups, the first group contains 8 ports, and the second group contains only 6 ports. Each port in first group corresponds to a configuration register in logical device 7, and the second group in logical device 8. Users can select those I/O ports functions by independently programming those configuration registers. Figure 8.1, 8.2, and 8.3 respectively show the GP I/O port's structure of logical device 7 and 8. Right after Power-on reset, those ports default to perform basic I/O functions. Figure 9.1 |
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