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PDF EM84510BP Data sheet ( Hoja de datos )
| Número de pieza | EM84510BP | |
| Descripción | PS/2 SCROLLING MOUSE CONTROLLER | |
| Fabricantes | ELAN Microelectronics Corp | |
| Logotipo |  |
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EM84510
PS/2 SCROLLING MOUSE CONTROLLER
GENERAL DESCRIPTION
The EM84510 Scrolling Mouse Controller is specially designed to control PS/2 mouse device. This single chip
can interface three key-switches four photo-couples plus z-axis direct to 8042 controller.
EM84510 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 traditional mouse, a great number of noises are generated when the grid is partially closed or opened. These
noises are usually mistaken for movement signals by traditional mouse controller and the cursor of the dispaly
screen is thus moved frequently up and down or back and forth. This will consume a great amount of energy.
The EM84510 mouse controller provides noise immunity circuits to eliminat these noise in order to reduce
energy consumption.
FEATURES
• Using 51k ±5% resistor for RC oscillation.
• Compatible with legacy PS/2 mouse.
• Compatible with Microsoft scrolling mouse.
• Built-in noise immunity circuit.
• Built-in current comparator for photo-couples input.
• Built-in three step dynamic input impedance.
• Three key-switches and four photo-couples inputs.
• Six types Z direction input:
1. Photo couples input. (Z/1)
4. Mechanical input. (Z/1)
2. Key-switches input.
5. Photo couples input. (Z/4)
3. Voltage-sensing input.
6. Mechanical input. (Z/2)
• Both key-press and key-release debounce interval 12 ms.
• The sampilng rate of motion detector is about 65KHz.
• Low power dissipation.
• Package type:
EM84510AP : 16DIP, Photo couples input. (Z/1) EM84510DP: 16DIP, Mechanical input. (Z/1)
EM84510BP : 16DIP, Key-switches input.
EM84510EP : 16DIP, Photo couples input. (Z/4)
EM84510CP : 16DIP, Voltage-sensing input. EM84510FP : 16DIP, Mechanical input. (Z/2)
PIN ASSIGNMENT
EM84510A/B/C/D/E/FP
VDD
OSC.OUT
Z1
Z2
CLK
DATA
OPT
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.
5.30.2001 1
1 page  
EM84510
PS/2 SCROLLING MOUSE CONTROLLER
iii). The counter accumulators are cleared after receiving any command except “Resend”.
iv). EM84510 receives a Resend command ( FE ), it transmit its last packet of data.
v). In the stream mode “Resend” is received by EM84510 following a 3-byte data packet transmission
to the system. EM84510 resend the 3-byte data packet prior to clearing the counter.
vi). A response is sent within 25 ms if
a). The system requires a response
b). An error is detected in the transmission
vii). When a command requiring a response is issued by the system ,another command should not be issue
until either the response is received or 25ms has passed.
E). PS/2 Mouse Commands Description:
There are 16 valid commands that transmits between the system and EM84510. The “FA” code is always the
first response to any valid input received from the system other than a Set Wrap Mode or Resend command.
The following table list the commands:
Hex Code
FF
FE
F6
F5
F4
F3,XX
F2
F0
EE
EC
EB
EA
E9
E8,XX
E7
E6
Command
Reset
Resend
Set Default
Disable
Enable
Set Sampling Rate
Read Device Type
Set Remote Mode
Set Wrap Mode
Reset Wrap Mode
Read Data
Set Stream Mode
Status Request
Set Resolution
Set Autospeed
Reset Autospeed
EM84510 echo code
FA,AA,00
XX,(XX,XX)
FA
FA
FA
FA,FA
FA,00
FA
FA
FA
FA,XX,XX,XX
FA
FA,XX,XX,XX
FA,FA
FA
FA
The following describes valid commands:
a). Reset ( FF )
EM84510 operation:
i). Completion the reset.
ii). Transmitted FA,AA,00 to the system.
iii). Set default:
sampling rate: 100 reports/s
non-autospeed
* This specification are subject to be changed without notice.
5.30.2001 5
5 Page 
EM84510
PS/2 SCROLLING MOUSE CONTROLLER
* All voltages in above table are compared with VSS.
* All parameters in above table are tested under VDD=5V.
* CLK & DATA output gates are open drains that connect to pull up resistors.
* X1, X2,Y1,Y2 Input Impedance
MAX.
TYP.
MIN.
16.0K
15.0K
14.0K
13.0K
12.0K
11.0K
10.0.K
9.0K
8.0K
7.0K
6.0K
5.0K
4.0K
3.0K
2.0K
1.0K
0
10.0M
1.0
2.0 3.0
VOLTS (LIN)
4.0
5.0
* This specification are subject to be changed without notice.
5.30.2001 11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet EM84510BP.PDF ] | |
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