Datenblatt-pdf.com

SC84510 Schematic ( Datenblatt PDF ) - Silan Microelectronics

Teilenummer SC84510
Beschreibung PS/2 SCROLLING MOUSE CONTROLIER
Hersteller Silan Microelectronics
Logo Silan Microelectronics Logo 



Gesamt 17 Seiten
		
SC84510 Datasheet, Funktion
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






SC84510 Datasheet, Funktion
Silan
Semiconductors
SC84510
FUNCTION DESCRIPTIONS
1. LEGACY PS/2 MOUSE OPERATING
(A) Operating mode
There are four operating modes in PS/2 mouse:
(a) Reset Mode:
In this mode a self-test is initiated during power-on or by a Reset command. After reset signal, PS/2 mouse
will send:
a Completion code AA & ID code 00.
b Set default:
* sampling rate: 100 reports/s
* non-autospeed
* stream mode
* 2 dot/count
* disable
(b) Stream Mode:
The maximum rate of transfer is the programmed sample rate.
Data report is transmitted if
a switch is pressed
b movement has been detect
(c) Remote Mode:
Data is transmitted only in response to a Read Data command.
(d) Wrap Mode:
Any byte of data sent by the system, except hex EC (Reset wrap mode) or hex FF (Reset), is returned by
SC84510.
(B) PS/2 Mouse Data Report:
(a) In stream mode: A data report is sent at the end of a sample interval.
(b) In remote mode: A data report is sent in response to Read Data command.
(c) Data report 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)
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
6

6 Page







SC84510 pdf, datenblatt
Silan
Semiconductors
SC84510
(C) Exiting Microsoft scrolling mode:
There are two ways to exit:
(a) Power off.
(b)Reset command (FF).
3. Z-AXIS INPUT FUNTION: The Z0 ~ Z7 limit value is ±7
(A) Photo couples input: Z-axis counter accumulates the Z1, Z2 phase changed by movement. This mode
includes noise immunity.
Z/1: 1 dot per count.
Z/4: 4 dots per count. Counted by Z1=1, Z2=1 phase, the wheel should stay at Z1=0, Z2=0 phase.
(B) Key-switches input: Pressing Z1, Z2 will start to fill the Z-axis counter with the value beginning at one.
Toggling “M” key can increase the value any time by one. The limit value is ±7.
The relationship between the value and the transmission rate as follow:
Value
1
2
3
4
5
6
7
Rate per second
2.7
6.4
9.2
12.8
15
18
20
(C) Voltage-sensing mode: There are 7 voltage levels in Z1, Z2 input. The transmission table is the same as key-
switch mode. The relationship between the value of Z-axis counter and the voltage as follows:
Value
0
1
2
3
4
5
6
7
Under VDD = 5V condition
Voltage
1V
1.0V – 1.6V
1.6V – 2.2V
2.2V - 2.8V
2.8V – 3.4V
3.4V – 4.0V
4.0V – 4.6V
4.6V
(D) Mechanical mode: The function is the same as photo couples input mode, except there is no noise immunity.
Z/1: 1 dot per count.
Z/2: 2 dots per count. Counted by Z2 changing phase.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
12

12 Page


SeitenGesamt 17 Seiten
PDF Download[ SC84510.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
SC84510PS/2 SCROLLING MOUSE CONTROLIERSilan Microelectronics
Silan Microelectronics

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com    |   2019   |  Kontakt  |   Suche