w83c43 Winbond Electronics Corp America, w83c43 Datasheet - Page 6

• Manufacturer Part Number: w83c43
• Description: Keyboard Controller
• Manufacturer: Winbond Electronics Corp America

ELECTRICAL CHARACTERISTICS & CAPACITANCE
(Ta = 0 C to + 70 C, V
STATUS REGISTER (AT MODE)
The status register is an 8-bit read-only register at I/O address hex 64 that holds information about the
status of the keyboard controller and interface. It may be read at any time.
SYMBOL
V
V
V
V
V
V
V
V
I
V
R
I
V
OFL
C
I
OH1
OH2
I
OL1
OL2
IL1
BIT
DD
IH1
IH2
IH3
IH
IL1
IL
IL
IP
L
0
1
Power Supply
Input Low Voltage (except RESET, T0,
T1)
Input Low Voltage (RESET, T0, T1)
Input High Voltage (except RESET, T0,
T1, P10, P11)
Input High Voltage (P10, P11)
Input High Voltage (T0, T1, RESET)
Output High Voltage (P10 P13,
P20 P27)
Output High Voltage (D0 D7)
Output Low Voltage (P10 P13,
P20 P27)
Output Low Voltage (D0 D7)
Min. I/P Resist
O/P Leakage Current (D0 D7, High Z
State)
I/P Leakage Current
I/P Leakage Current (Except P10, P11,
P14, P15, P16, P17)
I/P Leakage Current (P10, P11, P14,
P15, P16, P17)
O/P Load Capacity
Output Buffer Full
Input Buffer Full
DD
= +5V
BIT FUNCTION
DESCRIPTION
5%)
- 6 -
0: Output buffer empty
1: Output buffer full
0: Input buffer empty
1: Input buffer full
MIN.
4.75
10K
-10
-10
-10
-10
2.0
3.0
3.5
0.4
0.4
15
TYP.
5.0
DESCRIPTION
MAX.
5.25
550
0.8
0.6
2.4
2.4
10
10
10
50
UNIT
pF
V
V
V
V
V
V
V
V
V
V
A
A
A
A
W83C43
I
mA
I
mA
I
I
V
V
V
V
V
V
OH
OH
OL
OL
DD
IN
DD
IN
DD
IN
NOTE
= 2 mA
= 4 mA
= -2
= -4
= V
= V
= V
= 5.5V,
= 5.5V,
= 5.5V,
DD
SS
SS