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PDF SC84520 Data sheet ( Hoja de datos )
| Número de pieza | SC84520 | |
| Descripción | TWO IN ONE SCROLLING MOUSE CONTROLLER | |
| Fabricantes | Silan Microelectronics | |
| Logotipo |  |
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Silan
Semiconductors
SC84520
TWO IN ONE SCROLLING MOUSE
CONTROLLER
DESCRIPTION
The SC84520 Scrolling Mouse Controller id specially designed to
control serial mouse or PS/2 mouse device. This single chip can
interface three key-switched and 4 X-Y photo-couples plus Z-axis
directly plus Z-axis directly to RS-232C or 8042 controller.
There are four types Z-axis inputs used to implement scrolling
mouse functionality.
FEATURES
*Using 50kΩ ± 1% resistor for RC oscillation
*Compatible with legacy PS/2 mouse
*Compatible with Microsoft serial scrolling mouse
*Compatible with Microsoft PS/2 scrolling mouse
*Serial or PS/2 port auto-detect
*100 bytes PnP ID code could be filled by code layer
*Built-in noise immunity circuit
*The sampling rate of motion detector is up to 65 kHz
*Built-in three zener diodes : one in VDD to VSS, two in RTS to VDD
*CMOS push-pull RXD output
*Built-in current comparator for photo-couples input
*Built-in three step dynamic input impedance
*Three key-switches and four photo-coupled inputs
*RTS debouncing circuit include
*Photo couple test mode include
*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)
DIP-16
*Package type:
SC84510AP: 16DIP, Photo coupled
input(Z/1)
SC84510BP: 16DIP, Key-switches input
SC84510CP: 16DIP, Voltage-sensing
Input
SC84510DP: 16DIP, Mechanical input
(Z/1)
SC84510EP: 16DIP, Photo couples input
(Z/4)
SC84510FP: 16DIP, Mechanical input
(Z/2)
APPLICATIONS
*Serial PnP scrolling mouse
*PS/2 scrolling mouse
*Combo PnP scrolling mouse
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.0 2000.12.31
1
1 page  
Silan
Semiconductors
SC84520
PIN DESCRIPTION
Pin Name
I/O
OPT
I/O
OSC OUT
OSCR
CLK/RTS
DATA/RXD
VSS
R
M
L
X1
X2
Y1
Y2
Z1
Z2
VSS
VDD
O
I
I/O
I/O
--
I
I/O
I/O
I
I
Description
INPUT: 200kΩ pull low to VSS.
When OPT is connected to VDD, SC84520 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 with A/D/E/F version.
“1” = VDD, “0” = floating
High duty is about 60µs.
The RC oscillation clock output. Or 3mA sink current output for X, Y photo emitters.
Connect 50kΩ ± 1% precise resistor for oscillation.
Connect to 8024 auxiliary port CLK line in PS/2 mode or connect directly to RS232C
RTS pin in serial mode. Auto-detect the operating port by this pin.
Connect to 8024 auxiliary port DATA line in PS/2 mode or connect directly to
RS232C RXD pin in serial mode.
Negative power input.
Three key-switches inputs. 200kΩ resistor pull low.
In Z-axis key mode, M key toggling can change the scrolling speed from low to high.
Three step dynamic input impedance. If OSC OUT is not connected to LEDs, the
dynamic input impedance will be off.
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 level voltage comparator.
Mechanical mode: 13.2 kΩ resistor pull low, Current comparator input.
Negative power.
Power line.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.0 2000.12.31
5
5 Page 
Silan
Semiconductors
SC84520
d. Disable (F5)
This command is used in the stream mode to stop transmissions from SC84520.
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
Sample Rate
0A
14
28
3C
50
64
C9
g. Read Device Type (F2)
10/sec
20/sec
40/sec
60/sec
80/sec
100/sec
200/sec
SC84520 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)
SC84520 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.
h. Set Stream Mode (EA)
This command sets SC84520 in stream mode.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD.
Rev: 1.0 2000.12.31
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet SC84520.PDF ] | |
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