w83977f Winbond Electronics Corp America, w83977f Datasheet - Page 122

• Manufacturer Part Number: w83977f
• Description: Plug & Play 1.0a Compliant
• Manufacturer: Winbond Electronics Corp America

W83977F/ W83977AF
PRELIMINARY
8. GENERAL PURPOSE I/O
W83977F/ AF 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 8.1
Publication Release Date: March 1998
-110 -
Revision 0.58