W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 124

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

Table 8.1.1
Table 8.1.2
GP I/O PORT ACCESSED
0 = OUTPUT
1 = INPUT
I/O BIT
0
0
0
0
1
1
1
1
REGISTER
GP1
GP2
ENABLE INT BIT
0 = DISABLE
1 = ENABLE
0
0
1
1
0
0
1
1
REGISTER BIT
ASSIGNMENT
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
0 = NON INVERT
POLARITY BIT
1 = INVERT
-112 -
0
1
0
1
0
1
0
1
GP I/O PORT
Basic non-inverting output
Basic inverting output
Non-inverted output bit value of GP2
drive to Common Interrupt
Inverted output bit value of GP2 drive
to Common Interrupt
Basic non-inverting input
Basic inverting input
Non-inverted input drive to Common
Interrupt
Inverted input drive to Common
Interrupt
W83977F/ W83977AF
GP10
GP11
GP12
GP13
GP14
GP15
GP16
GP17
GP20
GP21
GP22
GP23
GP24
GP25
Publication Release Date: March 1998
BASIC I/O OPERATIONS
PRELIMINARY
Revision 0.58