|
|
PDF EM84520BP Data sheet ( Hoja de datos )
| Número de pieza | EM84520BP | |
| Descripción | 2-IN-ONE SCROLLING MOUSE CONTROLLER | |
| Fabricantes | ELAN Microelectronics Corp | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de EM84520BP (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
|
No Preview Available !
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
Preliminary
GENERAL DESCRIPTION
The EM84520 Scrolling Mouse Controller is specially designed to control serial mouse or PS/2 mouse device.
This single chip can interface three key-switches and 4 X-Y photo-couples 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 sampiling rate of motion detector is up to 65KHz.
• 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-couples inputs.
• RTS debouncing circuit included.
• Photo couple test mode included.
• Low power dissipation.
• 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)
• Package type:
EM84520AP : 16DIP, Photo couples input. (Z/1) EM84520DP: 16DIP, Mechanical input. (Z/1)
EM84520BP : 16DIP, Key-switches input.
EM84520EP : 16DIP, Photo couples input. (Z/4)
EM84520CP : 16DIP, Voltage-sensing input. EM84520FP : 16DIP, Mechanical input. (Z/2)
APPLICATION
• Serial PnP scrolling mouse.
• PS/2 scrolling mouse.
• Combo PnP scrolling mouse.
PIN ASSIGNMENT
EM84520A/B/C/D/E/F
VDD
OSC.OUT
Z1
Z2
CLK/RTS
DATA/RXD
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.
6.28.1999 1
1 page  
C) PS/2 mouse Data Transmission:
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
Preliminary
a). EM84520 generates the clocking signal when sending data to and receiving data from the system.
b). The system requests EM84520 receive system data output by forcing the DATA line to an inactive level
and allowing CLK line to go to an active level.
c). Data transmission frame:
Bit Function
1 Start bit ( always 0 )
2-9 Data bits ( D0 - D7 )
10 Parity bit ( odd parity )
11 Stop bit ( always 1 )
d). Data Output ( data from EM84520 to system ):
If CLK is low ( inhibit status ) , data is no transmission.
If CLK is high and DATA is low ( request-to-send ), data is updated. Data is received from the system
and no transmission are started by EM84520 until CLK and DATA both high. If CLK and DATA both
are high, the transmission is ready. DATA is valid prior to the falling edge of CLK and beyond the rising edge
of CLK. During transmission, EM84520 check for line contention by checking for an inactive level on CLK
at intervals not to exceed 100u sec. Contention occurs when the system lowers CLK to inhibit EM84520
output after EM84520 has started a transmission. If this occurs before the rising edge of the tenth clock,
EM84520 internal store its data in its buffer and returns DATA and CLK to an active level. If the contention
does not occur by the tenth clock, the transmission is complete.
Following a transmission, the system inhibits EM84520 by holding CLK low until it can service the input
or until the system receives a request to send a response from EM84520.
e). Data Input ( from system to EM84520 ):
The system first check if EM84520 is transmitting data. If EM84520 is transmitting, the system can override
the output forcing CLK to an inactive level prior to the tenth clock. If EM84520 transmission is beyond
the tenth clock, the system receives the data. If EM84520 is not transmitting or if the system choose to
override the output, the system force CLK to an inactive level for a period of not less than 100µ sec while
preparing for output. When the system is ready to output start bit (0), it allows CLK go to active level. If
request-to-send is detected, EM84520 clocks 11 bits. Following the tenth clock EM84520 checks for
an active level on the DATA line, and if found, force DATA low , and clock once more. If occurs framing
error, EM84520 continue to clock until DATA is high, then clocks the line control bit and request a
Resend. When the system sends out a command or data transmission that requires a response, the system
waits for EM84520 to response before sending its next output.
D). PS/2 Mouse Error Handling:
a). A Resend command ( FE ) following receipt of an invalid input or any input with incorrect parity.
b). If two invalid input are received in succession, an error code of hex (FC) is send to the system.
* This specification are subject to be changed without notice.
6.28.1999 5
5 Page 
ABSOLUTE MAXIMUM RATINGS
Parameter
Temperature under bias
Storage temperature range
Supply voltage
Power dissipation
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
Preliminary
Min.
0
-65
-0.3
-
Ratings
Max.
70
150
7.5
500
Unit
°C
°C
V
mW
DC ELECTRICAL CHARACTERISTICS (TA=25°C to 70°C)
Parameters
Sym. Min.
X1,X2,Y1,Y2,Z1,Z2 (photo mode)
low input reference current
X1,X2,Y1,Y2,Z1,Z2 (photo mode)
high input reference current
X1,X2,Y1,Y2,Z1,Z2 (photo mode)
input current
(input impedance) (80µA)
X1,X2,Y1,Y2,Z1,Z2 (photo mode)
input current
(input impedance) (500µA)
L,M,R,OPT,Z1,Z2 (key mode)
input low voltage
L,M,R,OPT,Z1,Z2 (key mode)
input high voltage
Z1,Z2 (voltage mode)
sensitivity
L,M,R,Z1,Z2 (key & voltage mode)
input current
(Vin=5V)
OPT
input current
OPT
high output current
(Iopt=20mA)
L,M,R,X1,X2,Y1,Y2,Z1,Z2
input leakage current
(Vin=0V)
OPT
input leakage current
(Vin=5V)
OSC.OUT
Sink current
IPL
IPh
VPI1
VPI2
Vail
Vaih
Vs
Imi
Ixi
Vopt
Iil
Iih
Iosc
70
-
0.8
1.5
-
3.5
-0.3
18
-18
4.5
0
0
3
Typ.
-
-
-
-
-
-
-
-
-
-
-
-
-
Max.
-
106
1.2
2.1
1.5
-
+0.3
56
-56
-
-1.0
1.0
3.6
Unit
µA
µA
V
V
V
V
V
µA
µA
V
µA
µA
mA
* This specification are subject to be changed without notice.
6.28.1999 11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet EM84520BP.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| EM84520BP | 2-IN-ONE SCROLLING MOUSE CONTROLLER | ELAN Microelectronics Corp |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |