eKK8011AB
USB & PS/2 Keyboard Encoder
Parameter
Sym.
Condition
Min.
Typ.
Max.
Unit
Output low voltage for LEDs
VOL2
IOL2 = 10 mA
−
3.0
−
V
Output low voltage for Mode
LED
VOL3
RPH1
IOL3 = 10 mA
VPH1 = 0V
−
−
1
−
−
V
Internal Pull-high resistance
(Ports 6, 9)
25
KΩ
Internal Pull-high resistance
for Data, CLK
RPH2
VPH2 = 0V
−
4.7
−
KΩ
Internal Pull-high resistance
for D-
RPH3
VOL3
VPH3 = 0V
−
−
1.5
0.4
−
−
KΩ
Output low voltage for Data
CLK
IOL3 = 5 mA
V
9 AC Electrical Characteristics
Parameter
Time from Data transition to falling edge of CLK
Time from rising edge of CLK to Data transition
Duration of CLK inactive
Sym.
T1
Min.
Typ.
Max.
Unit
S
5
5
−
25
T4 - 5
50
T2
−
S
T3
30
30
40
40
S
Duration of CLK active
T4
50
S
Time for auxiliary device inhibit after Clock 11 to ensure the
auxiliary device does not start another transmission
T5
−
−
50
S
Time from inactive to active CLK transition, used to time when
auxiliary device samples Data
T6
5
−
25
S
System clock
FCLK
−
6
−
MHz
26 •
Product Specification (V1.4) 07.10.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
