EM84502AM Ver la hoja de datos (PDF) - ELAN Microelectronics
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EM84502AM Datasheet PDF : 12 Pages
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EM84502
PS/2 MOUSE CONTROLLER
AC ELECTRICAL CHARACTERISTICS (TA=0°C to 70°C)
Parameters
Sym. Min.
Oscillating Frequency
Key Debounce
Rising Edge Crossed Width Fosc=35 KHz
Falling Edge Crossed Width Fosc=35 KHz
Mouse CLK Active Time
Mouse CLK Inactive Time
Mouse Sample DATA from
CLK rising Edge
System CLK Active Time
System CLK Inactive Time
Time from DATA Transition to Falling Edge of CLK
Time from rising Edge of CLK to DATA Transition
Time to mouse Inhibit after the 11th CLK to
ensure mouse does not start another Transmission
Fosc
Tkd
Tr
Tf
Tmca
Tmci
Tmdc
34.3-10%
-
14.3
14.3
-
-
-
Tsca
-
Tsci
-
Tsdc
-
Tscd
-
Tpi
0
Typ. Max.
34.3 34.3+10%
12
-
-
-
-
-
42.9
-
42.9
-
14.3
-
42.9
-
42.9
-
14.3
-
28.6
-
-
50
PS. The AC timings are measured under using 35 KHz system clock signal.
TIMING DIAGRAM
(1) Photo-couples pulse width :
Unit
KHz
ms
us
us
us
us
us
us
us
us
us
us
X1 (Y1)
X2 (Y2)
Tr
Tf
(2) PS/2 Mouse
(A) Receiving DATA
CLK
DATA
Inhibit
1st
CLK
2nd
CLK
9th
CLK
10th
CLK
><
Tmca
><
Tmdc
><
Tmci
••••••••• •••
Start
Bit
Bit0 -Bit7
•••••
Parity
Bit
11th
CLK
•••••
Stop
Line
••
Bit Control
Bit
* This specification are subject to be changed without notice.
6.18.1998 9
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