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EM83812EP Schematic ( PDF Datasheet ) - ELAN Microelectronics Corp

Teilenummer EM83812EP
Beschreibung ALL-INONE PLUG & PLAY SCRLLING SERIAL MOUSE CONTROLLER
Hersteller ELAN Microelectronics Corp
Logo ELAN Microelectronics Corp Logo 




Gesamt 11 Seiten
EM83812EP Datasheet, Funktion
EM83812
ALL-INONE PLUG & PLAY SCRLLING SERIAL MOUSE CONTROLLER
Preliminary
GENERAL DESCRIPTION
The EM83812 PnP Scrolling Mouse Controller is specially designed to control serial mouse device.
This single chip can interface three key-switches and 4 X-Y photo-couples plus Z-axis directly to RS-232C.
There are four types Z-axis inputs used to implement scrolling mouse functionality.
FEATURES
• Using 50kΩ ±1% resistor for RC oscillation.
• Compatible with Microsoft serial scrolling mouse.
• 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:
EM83812AP : 16DIP, Photo couples input. (Z/1) EM83812DP: 16DIP, Mechanical input. (Z/1)
EM83812BP : 16DIP, Key-switches input.
EM83812EP : 16DIP, Photo couples input. (Z/4)
EM83812CP : 16DIP, Voltage-sensing input. EM83812FP : 16DIP, Mechanical input. (Z/2)
APPLICATION
• Serial PnP scrolling mouse.
PIN ASSIGNMENT
EM83812A/B/C/D/E/FP
VDD
OSC.OUT
Z1
Z2
RTS
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.
9.3.1999 1






EM83812EP Datasheet, Funktion
EM83812
ALL-INONE PLUG & PLAY SCRLLING SERIAL MOUSE CONTROLLER
Preliminary
AC ELECTRICAL CHARACTERISTICS (TA=0°C to 70°C)
Parameters
Sym. Min. Typ. Max. Unit
Oscillating Frequency
Key Debounce
Transnission time
Start bit time
Data bit time
Stop bit time
Mode code delay time
Rising Edge Crossed Wid
Falling Edge Crossed Wid
Fosc -3.3% 32.40 +3.3%
Tkd - 13
-
Tmx - 33.33
.
Ts
- 833.3
-
Td
- 833.3
-
Tp
- 833.3
-
Trd 11 -
14
Tr 15.4 -
-
Tf 15.4 -
-
KHz
ms
ms
us
us
us
ms
us
us
* This specification are subject to be changed without notice.
9.3.1999 6

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