|
|
Teilenummer | EM84502AM |
|
Beschreibung | PS/2 MOUSE ENCODER | |
Hersteller | ELAN Microelectronics Corp | |
Logo | ||
Gesamt 12 Seiten EMEM884455002
PS/2 PMS/O2 UMSOEUSCEOCNOTNRTROOLLLLEERR
GENERAL DESCRIPTION
The EM84502 Mouse Controller is specially designed to control PS/2 mouse device.This single chip can
interface three key-switches and four photo-couples direct to 8042. EM84502 can receive command and echo
status or data format which are compatible with IBM PS/2 mode mouse. Key debouncing circuit is provided
to prevent false entry and improve the accuracy.
In the conventional mouse, a great number of noises are generated when the grid is partially closed or opened.
These noise are usually mistaken for movement signals by conventional mouse controller and the cursor of the
dispaly screen is thus moved frequently up and down or back and forth. This will consumes a great amount of
energy.The EM84502 PS/2 mouse controller provides noise immunity circuits to eliminate these noise
in order to reduce energy consumption.
FEATURES
• Being compatiable with PS/2 mouse mode.
• Built-in noise immunity circuit.
• Low power dissipation.
• RC oscillation.
• Three key-switches and four photo-couples inputs.
• Both key-press and key-release debounce interval 12 ms.
• Through three key-switches input, EM84502 can exert seven different output.
• The motion detector of the EM84502 could sense 8 m/sec maximun with 200 DPI wheels.
APPLICATIONS
• Optical mouse or pen-mouse.
• Mechanical mouse or pen-mouse.
• Optomechanical mouse or pen-mouse.
• Mechanical track ball.
• Optomechanical track ball.
PIN ASSIGNMENT
EM84502AP
VDD
OP
OSC.OUT
CLK
DATA
VSS
R
1
2
3
4
5
6
7
14 OSCR
13 Y2
12 Y1
11 X2
10 X1
9L
8M
EM84502BP
VDD
OP
NC
NC
OSC.OUT
CLK
DATA
VSS
1
2
3
4
5
6
7
8
16 OSCR
15 Y2
14 Y1
13 X2
12 X1
11 L
10 M
9R
EM84502AM
VDD
OP
OSC.OUT
CLK
DATA
VSS
R
1
2
3
4
5
6
7
14 OSCR
13 Y2
12 Y1
11 X2
10 X1
9L
8M
EM84502BM*
VDD
OP
NC
NC
OSC.OUT
CLK
DATA
VSS
1
2
3
4
5
6
7
8
16 OSCR
15 Y2
14 Y1
13 X2
12 X1
11 L
10 M
9R
* This specification are subject to be changed without notice.
* (Under developed)
6.18.1998 1
EM84502
PS/2 MOUSE CONTROLLER
c). Set Default ( F6 )
The command reinitializes all conditions to the power-on defaults.
d). Disable ( F5 )
This command is used in the stream mode to stop transmissions from EM84502.
e). Enable ( F4 )
Begins transmissions, if in stream mode.
f). Set Sampling Rate ( F3,XX )
In the stream mode, this command sets the sampling rate to the value indicated by byte hex XX,
shown in following:
Second byte XX
0A
14
28
3C
50
64
C8
Sample Rate
10/sec
20/sec
40/sec
60/sec
80/sec
100/sec
200/sec
g). Read Device Type ( F2 )
EM84502 always echoes “ FA,00 “ following this command.
h). Set Remote Mode ( F0 )
Data value are reported only in response to a Read Data command.
i). Set Wrap Mode ( EE )
Wrap mode remains until Reset ( FF ) or Reset Wrap Mode( EC ) is received.
j). Reset Wrap Mode ( EC )
EM84502 returns to the previous mode of operation after receiving this command.
k). Read Data ( EB )
This command is executed in either remote or stream mode. The data is transmitted even if there has been
no movement since the last report or the button status is unchanged. Following a Read Data command,
the registers are cleared after a data transmission.
l). Set Stream Mode ( EA )
This command sets EM84502 in stream mode.
m). Status Request ( E9 )
When this command is issued by the system, EM84502 respond with a 3-byte status report as follows:
Byte Bit
10
1
2
Description
1 = Right button pressed
1 = Middle button pressed
1 = Left button pressed
* This specification are subject to be changed without notice.
6.18.1998 6
6 Page 14 PDIP
EM84502
PS/2 MOUSE CONTROLLER
F
E1
15°(4X)
eB
1
15°(2X)
C
5°(2X)
ϑ
D
B
B1 e
E1
A
A1
L1
L
Symbol
A
A1
B
B1
C
D
E1
F
L
L1
e
eB
ϑ
MIN.
-
.059
-
-
-
.740
.259
.290
-
-
-
.345
0°
Inches
TYP.
.130
.060
.018
.060
.010
.750
.260
.300
.130
.020
.100
.355
7.5°
MAX.
-
.061
-
-
-
.760
-
.310
-
-
-
.365
15°
Milimeters
MIN.
-
1.499
-
-
-
18.796
6.579
7.366
-
-
-
8.763
0°
TYP.
3.302
1.524
0.457
1.524
0.254
19.050
6.604
7.620
3.302
0.506
2.540
9.017
7.5°
MAX.
-
1.549
-
-
-
19304
-
7.874
-
-
-
9.271
15°
* This specification are subject to be changed without notice.
6.18.1998 12
12 Page | ||
Seiten | Gesamt 12 Seiten | |
PDF Download | [ EM84502AM Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
EM84502AM | PS/2 MOUSE ENCODER | ELAN Microelectronics Corp |
EM84502AP | PS/2 MOUSE ENCODER | ELAN Microelectronics Corp |
Teilenummer | Beschreibung | Hersteller |
CD40175BC | Hex D-Type Flip-Flop / Quad D-Type Flip-Flop. |
Fairchild Semiconductor |
KTD1146 | EPITAXIAL PLANAR NPN TRANSISTOR. |
KEC |
www.Datenblatt-PDF.com | 2020 | Kontakt | Suche |