EM84510FP ELAN Microelectronics Corp, EM84510FP Datasheet

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EM84510FP

Manufacturer Part Number
EM84510FP
Description
PS/2 scrolling mouse controller
Manufacturer
ELAN Microelectronics Corp
Datasheet

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GENERAL DESCRIPTION
FEATURES
PIN ASSIGNMENT
* This specification are subject to be changed without notice.
The EM84510 Scrolling Mouse Controller is specially designed to control PS/2 mouse device. This single chip
can interface three key-switches four photo-couples plus z-axis direct to 8042 controller.
EM84510 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 dispaly
screen is thus moved frequently up and down or back and forth. This will consume a great amount of energy.
The EM84510 mouse controller provides noise immunity circuits to eliminat these noise in order to reduce
energy consumption.
• Using 51k 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 step dynamic input impedance.
• Three key-switches and four photo-couples inputs.
• Six types Z direction input:
• Both key-press and key-release debounce interval 12 ms.
• The sampilng rate of motion detector is about 65KHz.
• Low power dissipation.
• Package type:
1. Photo couples input. (Z/1)
2. Key-switches input.
3. Voltage-sensing input.
EM84510AP : 16DIP, Photo couples input. (Z/1) EM84510DP: 16DIP, Mechanical input. (Z/1)
EM84510BP : 16DIP, Key-switches input.
EM84510CP : 16DIP, Voltage-sensing input.
EM84510A/B/C/D/E/FP
OSC.OUT
DATA
CLK
OPT
VSS
V
DD
Z1
Z2
1
2
3
4
5
6
7
8
4. Mechanical input. (Z/1)
5. Photo couples input. (Z/4)
6. Mechanical input. (Z/2)
EM84510EP : 16DIP, Photo couples input. (Z/4)
EM84510FP : 16DIP, Mechanical input. (Z/2)
16
15
14
13
12
11
10
9
PS/2 SCROLLING MOUSE CONTROLLER
OSCR
Y2
Y1
X2
X1
L
M
R
5.30.2001
EM84510
1

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EM84510FP Summary of contents

Page 1

... EM84510CP : 16DIP, Voltage-sensing input. PIN ASSIGNMENT * This specification are subject to be changed without notice. PS/2 SCROLLING MOUSE CONTROLLER 4. Mechanical input. (Z/1) 5. Photo couples input. (Z/4) 6. Mechanical input. (Z/2) EM84510EP : 16DIP, Photo couples input. (Z/4) EM84510FP : 16DIP, Mechanical input. (Z/2) EM84510A/B/C/D/E/ OSCR DD OSC.OUT ...

Page 2

FUNCTIONAL BLOCK DIAGRAM OPT OSC.OUT PIN DESCRIPTIONS Symbol I/O OPT I/O OSC.OUT O ...

Page 3

FUNCTION DESCRIPTIONS 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- Reset command. After reset signal, PS/2 mouse will ...

Page 4

C) PS/2 mouse Data Transmission: i). EM84510 generates the clocking signal when sending data to and receiving data from the system. ii). The system requests EM84510 receive system data output by forcing the DATA line to an inactive level and ...

Page 5

The counter accumulators are cleared after receiving any command except “Resend”. iv). EM84510 receives a Resend command ( transmit its last packet of data. v). In the stream mode “Resend” is received by EM84510 following a ...

Page 6

Resend ( FE ) i). Any time EM84510 receives an invalid command, it returns a Resend command to the system. ii). When EM84510 receives a Resend command, it retransmits its last packet of data. ...

Page 7

Set Stream Mode ( EA ) This command sets EM84510 in stream mode. m). Status Request ( E9 ) When this command is issued by the system, EM84510 respond with a 3-byte status report as follows: Byte Bit 1 ...

Page 8

Microsoft PS/2 scrolling mouse mode: (A) Entering procedure: Except in WRAP mode, while EM84510 received the following consecutive command ---- set sampling rate 200/sec ii ---- set sampling rate 100/sec iii ---- set ...

Page 9

Value (c) Voltage-sensing mode : There are 7 voltage levels in Z1, Z2 input. The transmission table is the same as key-switches mode. The relationship between the value of Z-axis counter and the ...

Page 10

ABSOLUTE MAXIMUM RATINGS Parameter Temperature under bias Storage temperature range Input voltage Output voltage DC ELECTRICAL CHARACTERISTICS (T Parameters Operating voltage Operating current 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) ...

Page 11

All voltages in above table are compared with V * All parameters in above table are tested under V * CLK & DATA output gates are open drains that connect to pull up resistors. * X1, X2,Y1,Y2 Input Impedance ...

Page 12

AC ELECTRICAL CHARACTERISTICS (T Parameters Oscillating Frequency (OSCR=51K ) Key Debounce Rising Edge Crossed Width Fosc=35 KHz Falling Edge Crossed Width Fosc=35 KHz Mouse CLK Active Time Mouse CLK Inactive Time Mouse Sample DATA from CLK rising Edge System CLK ...

Page 13

Sending DATA 1st CLK CLK > Tsci > < Tsdc DATA Start Bit AC Timing point: DATA, V -2.6 DD CLK PIN X1,X2,Y1,Y2 PIN CLK,DATA PIN L,M,R PIN EM84510 I/O pin equivalent circuit : R,M,L : (R,M,L) INTERNAL SIGNAL ...

Page 14

APPLICATION CIRCUIT * This specification are subject to be changed without notice. PS/2 SCROLLING MOUSE CONTROLLER EM84510 5.30.2001 14 ...

Page 15

This specification are subject to be changed without notice. PS/2 SCROLLING MOUSE CONTROLLER EM84510 5.30.2001 15 ...

Page 16

This specification are subject to be changed without notice. PS/2 SCROLLING MOUSE CONTROLLER EM84510 5.30.2001 16 ...

Page 17

CLK 1 6 DATA OPT OSC.OUT 6 16 OSCR 51K EM84510D EM84510F * Mechanical Encoder ...

Page 18

PAD DIAGRAM RTSCK 6 RXDBDAT 7 OPT Chip Size : 1780 m x 1430 m (EL5750) Pad No. Sym. 1 ZZ0 1 VDD 2 OSCOUT RTSCK 6 RXDBDAT 7 OPT NC 8 ...

Page 19

Z2 5 RTSCK 6 RXDBDAT OPT 7 Chip Size : 1780 m x 1430 m (EL5750) Pad No. Sym. 1 ZZ0 1 VDD 2 OSCOUT RTSCK 6 RXDBDAT 7 OPT 8 GND 8 GND ...

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