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PDF SC84510 Data sheet ( Hoja de datos )
| Número de pieza | SC84510 | |
| Descripción | PS/2 SCROLLING MOUSE CONTROLIER | |
| Fabricantes | Silan Microelectronics | |
| Logotipo |  |
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Silan
Semiconductors
SC84510
PS/2 SCROLLING MOUSE
CONTROLIER
DESCRIPTION
The SC84510 Scrolling Mouse Controller is specially designed to
control PS/2 mouse device. This single chip can interface three key-
switches four photo-couples plus x-axis direct to 8042 controller.
SC84510 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 display screen is thus moved frequently up and
down or back and forth. This will consume a great amount of energy.
The SC84510 mouse controller provides noise immunity circuits to
eliminate these noises in order to reduce energy consumption.
DIP-16
FEATURES
* Using 50k ±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 steps dynamic input impedance.
* Three key-switches and four photo-couples inputs.
* Both key-press and key-release debounce interval 12 ms.
* The sampling rate of motion detector is about 65KHz.
* Low power dissipation.
* Six types Z direction input:
1. Photo couples input. (Z/1)
2. Key-switches input.
3. Voltage-sensing input.
4. Mechanical input. (Z/1)
5. Photo couples input. (Z/4)
6. Mechanical input. (Z/2)
ORDERING INFORMATION
SC84510AP
DIP-16 Package, Photo couples input. (Z/1)
SC84510BP
DIP-16 Package, Key-switches input.
SC84510CP
DIP-16 Package, Voltage-sensing input.
SC84510DP
DIP-16 Package, Mechanical input. (Z/1)
SC84510EP
DIP-16 Package, Photo couples input. (Z/4)
SC84510FP
DIP-16 Package, Mechanical input. (Z/2)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
1
1 page  
Silan
Semiconductors
SC84510
PIN DESCRIPTION
Pin Name
I/O
OPT
I/O
OSC OUT
OSCR
CLK
DATA
R
M
L
X1
X2
Y1
Y2
Z1
Z2
VSS
VDD
O
I
I/O
I/O
I
I
I
Description
INPUT: 200kΩ pull low to VSS.
When OPT is connected to VDD, SC84510 will enter test mode. In test mode, L will
be the output of X1, while M will be the output of X2. Toggling R key can change
these output to be Y1, Y2 or Z1, Z2 respectively.
OUTPUT: 2kHz Z-axis LED-driving source.
“1” = VDD, “0” = floating
High duty is about 60µs.
RC mode oscillation with 50kΩ resistor.
Connect to 8042 auxiliary port CLK line.
Connect to 8042 auxiliary port DATA line.
Three key-switches inputs.
200kΩ resistor pull low.
Three step dynamic input impedance.
Use current comparator to measure photo-couples “ON”, or “OFF”.
Z-axis input.
Photo mode: Three steps dynamic input impedance. Current comparator input.
Key mode: 200kΩ resistor pull low. 7 levels increased by “M” key.
Voltage mode: 200kΩ resistor pull low. 7 levels voltage comparator.
Mechanical mode: 13.2kΩ resistor pull low.
Negative power.
Power line.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
5
5 Page 
Silan
Semiconductors
SC84510
At the end of a sample interval in the stream mode, the current X and Y data values are converted new
values. The sign bits are not involved in this conversion. The conversion is only in stream mode. The
relationship between the input and output count follows:
Input
Output
00
11
21
33
46
59
N( ≥6)
2.0*N
(p) Reset Auto-speed (E6)
This command restores normal speed.
2. MICROSOFT PS/2 SCROLLING MOUSE MODE:
(A) Entering procedure: Except in WRAP mode, While SC84520 received the following consecutive command.
(a) F3 C8 ---- set sampling rate 200/sec
(b) F3 64
---- set sampling rate 100/sec
(c) F3 50 ---- set sampling rate 80/sec
(B) Operating:
(a) All of the command in legacy mode still is valid.
(b) The ID code of read device type command (F2) will changed from “00” to be “03”.
(c) Data report will be four bytes format:
Byte
Bit
Description
1 0 Left button status; 1 = pressed
1 Right button status; 1 = pressed
2 Middle button status; 1 = pressed
3 Reserve
4 X data sign; 1 = negative
5 Y data sign; 1 = negative
6 X data overflow; 1 = overflow
7 Y data overflow; 1 = overflow
2
0-7
X data (D0 – D7)
3
0-7
Y data (D0 – D7)
4
0-7
Z data (D0 – D7)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet SC84510.PDF ] | |
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