W83C43 Datasheet, PDF (4/21 Pages) Winbond – KEYBOARD CONTROLLER

W83C43
Pin Description, continued
PIN NO.
(40-pin
DIP)
27
(44-pin
PLCC)
30
28
31
29
32
30
33
31
35
32
36
33
37
34
38
35
39
36
40
37
41
38
42
39
43
40
44
* Internal pull-up resistor
I/O NAME
FUNCTION
AT MODE
PS/2 MODE
I/O
P10
Bit 0 of Port1
PU*
(User-defined I/O)
Bit 0 of Port1
(K/B Data Input)
I/O
P11
Bit 1 of Port1
PU*
(User-defined I/O)
Bit 1 of Port1
(Mouse Data Input)
I/O
P12
Bit 2 of Port2
Bit 2 of Port2
(User-defined I/O)
(User-defined I/O)
I/O
P13
Bit 3 of Port1
Bit 3 of Port1
(User-defined I/O)
(User-defined I/O)
I
P14 Bit 4 of Port1
PU*
(RAM: RAM Jumper
Select)
Bit 4 of Port1
(RAM: RAM Jumper
Select)
I
P15 Bit 5 of Port1
PU*
(JUMP: Jumper)
Bit 5 of Port1
(JUMP: Jumper)
I
P16 Bit 6 of Port1
Bit 6 of Port1
PU*
(DISP: Display Select)
(DISP: Display Select)
I
P17 Bit 7 of Port1
Bit 7 of Port1
PU*
(KINH: K/B Inhibit Switch) (KINH: K/B Inhibit Switch)
O
P24 Bit 4 of Port2
Bit 4 of Port2
(KINT: K/B OBF O/P
Interrupt)
(KINT: K/B OBF O/P
Interrupt)
O
P25 Bit 5 of Port2
Bit 5 of Port2
(IEMP: I/P Buffer Empty) (MINT: Mouse OBF O/P
Interrupt)
O
P26 Bit 6 of Port2
Bit 6 of Port2
(KCLK: K/B Clock Output) (KCLK: K/B Clock Output)
O
P27 Bit 7 of Port2
Bit 7 of Port2
(KDAT: K/B Data Output) (KDAT: K/B Data Output)
I
T1
K/B Data Input
Mouse Clock Input
-
Vcc +5V Power Supply
+5V Power Supply
-4-