w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 164

• Manufacturer Part Number: w83977atf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

7.2 Alternate I/O Functions
W83977ATF
7.2.1 shows their assignments. Polarity bit can also be set to alter their polarity.
Table 7.2.1
7.2.1 Interrupt Steering
GP10, GP11, GP30, and GP31
selection of IRQ channel can be done in
and logical device
reject any noise
GP I/O PORT
GP10
GP11
GP12
GP13
GP14
GP15
GP16
GP17
GP20
GP21
GP22
GP23
GP24
GP25
GP30
GP31
GP32
GP33
GP34
provides several alternate functions
whose width
9. Each interrupt channel also has its own 1 ms debounce filter that is used to
Interrupt Steering
Interrupt Steering
Watch Dog Timer Output/IRRX input
Power LED output/IRTX output
General Purpose Address Decoder/Keyboard Inhibit(P17)
General Purpose Write Strobe/ 8042 P12
Watch Dog Timer Output
Power LED output
Keyboard Reset (8042 P20)
8042 P13
8042 P14
8042 P15
8042 P16
GATE A20 (8042 P21)
Interrupt Steering
Interrupt Steering
General Purpose Address Decoder
General Purpose Address Decoder
Watch Dog Timer Output
is equal to or less than 1 ms.
can be programmed to map their own interrupt channels. The
ALTERNATE FUNCTION
configuration
which are scattered among the
-108 -
registers CR70 and CR72 of logical device 7
Publication Release Date:April 1998
W83977ATF
PRELIMINARY
GP I/O ports. Table
Revision 0.53