EM84520EP [ELAN]
2-IN-ONE SCROLLING MOUSE CONTROLLER; 2 -IN- ONE滚轮鼠标控制器
| 型号： | EM84520EP |
| 厂家： | 
ELAN MICROELECTRONICS CORP |
| 描述： | 2-IN-ONE SCROLLING MOUSE CONTROLLER |
| 文件： | 总19页 (文件大小：123K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
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)
2. Key-switches input.
3. Voltage-sensing input.
• Package type:
4. Mechanical input. (Z/1)
5. Photo couples input. (Z/4)
6. Mechanical input. (Z/2)
EM84520AP : 16DIP, Photo couples input. (Z/1) EM84520DP: 16DIP, Mechanical input. (Z/1)
EM84520BP : 16DIP, Key-switches input.
EM84520CP : 16DIP, Voltage-sensing input.
EM84520EP : 16DIP, Photo couples input. (Z/4)
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
V
DD
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OSCR
Y2
Y1
X2
X1
L
OSC.OUT
Z1
Z2
CLK/RTS
DATA/RXD
OPT
M
VSS
R
* This specification are subject to be changed without notice.
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EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
FUNCTIONAL BLOCK DIAGRAM
THREE TYPES SELECTOR
DATA/RXD
CLK/RTS
Z1
Z2
VOLTAGE
SENSOR
KEY-SWITCH
DETECTOR
COMPARATOR
Z-AXIS COUNTER
C
O
M
P
A
R
A
T
O
R
OPT
X1
D
E
T
E
C
T
O
R
M
O
T
I
O
N
DATA
I/O
COUNTER
MULTIPLEXER
X2
Y1
Y2
D
E
B
O
U
N
C
E
L
M
COMMAND
STATUS
TIMING
CONTROLLER
R
SYSTEM CLOCK
GENERATOR
OSCR
OSC.OUT
RC
OSCILLATION
PIN DESCRIPTIONS
Symbol
I/O
I/O
Function
INPUT: 200kohm pull low to VSS.
OPT
When OPT is connected to VDD, EM84520 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 60us.
OSC.OUT
O
The RC oscillation clock output. Or 3mA sink current output for X, Y photo
emitters.
OSCR
I
Connect 50kΩ±1% precise resistor for oscillation.
CLK/RTS
I/O
Connect to 8042 auxiliary port CLK line in PS/2 mode or connect directly to RS-
232C RTS pin in serial mode. Auto-detect the operating port by this pin.
Connect to 8042 auxiliary port DATA line in PS/2 mode or connect directly to RS-
232C RXD pin in serial mode.
DATA/RXD
I/O
R
M
L
I
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.
I/O
I/O
X1
X2
Y1
Y2
Z1
Z2
I
I
I
I
I
I
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 : 200 kΩ resistor pull low. 7 levels increased by "M" key.
Voltage mode : 200 kΩ resistor pull low. 7 levels voltage comparator.
Mechanical mode : 13.2kΩ resistor pull low. Current comparator input.
Negative power.
VSS
VDD
Power line.
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* This specification are subject to be changed without notice.
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EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
FUNCTION DESCRIPTIONS
(I) Serial Scrolling Mouse :
In Microsoft mode, the transmission cycle consists of four bytes in one report. Each byte contains one start
bit, 7 data bits and two stop bits. The first byte contains "L", "R" key status and four bits of the two most
significant bits in horizontal counter and vertical counter. The second byte represents the value accumulated
by horizontal counter, the third byte is the data of the vertical counter. The last byte contains "M" key status
and Z-axis value. The vertical data is transmitted in 2's complement.
Output byte arrange
Bit no.
......
......
....
....
....
6
1
0
0
0
5
L
H5
V5'
0
4
R
H4
V4'
M
3
V7'
H3
V3'
Z3
2
V6'
H2
V2'
Z2
1
H7
H1
V1'
Z1
0
H6
H0
V0'
Z0
1st byte
2nd byte
3rd byte
4th byte
Plug & Play ID code
When RTS input from low to high, EM84520 will send a string ID code. Customer can specify the contains
of the code area and the total lenth below 100 bytes by changing the code layer.
Field Name
Other ID
Begin ID
PnP Revision
EISA ID
Length
<17
1
2
3
Field Data
4D, 5A, 40, 00, 00, 00
08
01, 24
Description
ID for legacy
Begin PnP ID
Version 1.00
EMC
25, 2D, 23
Product ID
Serial Number
Class ID
Driver ID
User Name
4
9
<34
<42
<42
10, 10, 10, 11
3C
0001
None provided
Mouse Class
PnP0F0A
EMC SCROLLING
SERIAL MOUSE
3C, 2D, 2F, 35, 33, 25
3C, 30, 2E, 30, 10 26, 10, 21
3C, 25, 2D, 23, 00, 33, 23, 32,
2F, 2C, 2C, 29, 2E, 27, 00, 33,
25, 32, 29, 21, 2C, 00, 2D, 2F,
35, 33, 25
Check sum
End PnP
2
1
21, 15
09
2 bytes checks um
End PnP ID
(II) 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 :
(a) Send completion code AA & ID code 00.
(b) Set default :
* This specification are subject to be changed without notice.
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EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
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 EM84520.
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
1
2
3
Left button status; 1 = pressed
Right button status; 1 = pressed
Middle button status; 1 = pressed
Reserve
4
5
6
7
0-7
0-7
X data sign; 1 = negative
Y data sign; 1 = negative
X data overflow; 1 = overflow
Y data overflow; 1 = overflow
X data ( D0 - D7 )
2
3
Y data ( D0 - D7 )
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* This specification are subject to be changed without notice.
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2-IN-ONE SCROLLING MOUSE CONTROLLER
C) PS/2 mouse Data Transmission:
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 )
Data bits ( D0 - D7 )
Parity bit ( odd parity )
Stop bit ( always 1 )
2-9
10
11
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.
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EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
c). The counter accumulators are cleared after receiving any command except “Resend”.
d). EM84520 receives a Resend command ( FE ), it transmit its last packet of data.
e). In the stream mode “Resend” is received by EM84520 following a 3-byte data packet transmission
to the system. EM84520 resend the 3-byte data packet prior to clearing the counter.
f). A response is sent within 25 ms if
a). The system requires a response
b). An error is detected in the transmission
g). If EM84520 is in the stream mode :
a). The system disables EM84520 before issuing any command requiring a response.
b). When a command requiring a response is issued by the system ,another command should not be issue
until either the response is received or 25ms has passed.
E). PS/2 Mouse Commands Description:
There are 16 valid commands that transmits between the system and EM84520. The “FA” code is always the
first response to any valid input received from the system other than a Set Wrap Mode or Resend command.
The following table list the commands:
Hex Code
Command
EM84520 echo code
FF
Reset
FA,AA,00
FE
Resend
XX,(XX,XX)
F6
Set Default
FA
F5
Disable
FA
F4
Enable
FA
F3,XX
F2
F0
Set Sampling Rate
Read Device Type
Set Remote Mode
Set Wrap Mode
Reset Wrap Mode
Read Data
Set Stream Mode
Status Request
Set Resolution
Set Auto-speed
Reset Auto-speed
FA,FA
FA,00
FA
FA
EE
EC
EB
EA
E9
E8,XX
E7
FA
FA,XX,XX,XX
FA
FA,XX,XX,XX
FA,FA
FA
E6
FA
The following describes valid commands:
a). Reset ( FF )
EM84520 operation:
a). Completion the reset.
b). Transmitted FA, AA, 00 to the system.
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* This specification are subject to be changed without notice.
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EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
c). Set default:
sampling rate: 100 reports/s
non-autospeed
stream mode
2 dots/count
disable
b). Resend ( FE )
a). Any time EM84520 receives an invalid command, it returns a Resend command to the system.
b). When EM84520 receives a Resend command, it retransmits its last packet of data. If the last packet was
a Resend command, it transmits the packet just prior to the Resend command.
c). In stream mode, if a Resend command is received by EM84520 immediately following a 3-byte data
packet transmission to the system.
c). Set Default ( F6 )
The command reinitializes all conditions to the power-on defaults.
d). Disable ( F5 )
This command is used in the stream mode to stop transmissions from EM84520.
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
10/sec
14
28
3C
50
64
C8
20/sec
40/sec
60/sec
80/sec
100/sec
200/sec
g). Read Device Type ( F2 )
EM84520 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 )
EM84520 returns to the previous mode of operation after receiving this command.
k). Read Data ( EB )
* This specification are subject to be changed without notice.
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EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
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.
l). Set Stream Mode ( EA )
This command sets EM84520 in stream mode.
m). Status Request ( E9 )
When this command is issued by the system, EM84520 respond with a 3-byte status report as follows:
Byte
1
Bit
0
1
2
3
Description
1 = Right button pressed
1 = Middle button pressed
1 = Left button pressed
Reserved
4
5
6
7
0 = Normal speed, 1 = Autospeed
0 = Disabled, 1 = Enabled
0 = Stream mode, 1 = Remote mode
Reserved
2
3
0-7
0-7
Current resolution setting ( D0 - D7 )
Current sampling rate ( D0 - D7 )
n). Set Resolution ( E8,XX )
EM84520 provides four resolutions selected by the second byte of this command as follows:
Second Byte XX
00
Resolution
8 dots/count
01
02
03
4 dots/count
2 dots/count
1 dot/count
o). Set Autospeed ( E7 )
At the end of a sample interval in the stream mode, the current X and Y data values are converted new values.
The sign bits are not involved in this conversion. The conversion is only in stream mode. The relationship
between the input and output count follows:
Input
0
Ouput
0
1
2
3
4
1
1
3
6
9
5
N(≥6 )
2.0*N
p). Reset Autospeed ( E6 )
This command restore normal speed.
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* This specification are subject to be changed without notice.
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2-IN-ONE SCROLLING MOUSE CONTROLLER
(III).Microsoft PS/2 scrolling mouse mode:
(A) Entering procedure: Except in WRAP mode, while EM84520 received the following consecutive
command.
i. F3 C8
ii. F3 64
iii. F3 50
---- set sampling rate 200/sec
---- set sampling rate 100/sec
---- set sampling rate 80/sec
(B) Operating:
a. All of the commands in legacy mode still be valid.
b. The ID code of read device type command (F2) will changed from "00" to be "03".
c. Data report will be four bytes format:
Byte
1
Bit
0
1
2
3
Description
Left button status; 1 = pressed
Right button status; 1 = pressed
Middle button status; 1 = pressed
Reserve
4
5
6
7
0-7
0-7
0-7
X data sign; 1 = negative
Y data sign; 1 = negative
X data overflow; 1 = overflow
Y data overflow; 1 = overflow
X data ( D0 - D7 )
2
3
4
Y data ( D0 - D7 )
Z data ( D0 - D7 )
(C) Exiting Microsoft scrolling mode:
There are two ways to exit:
a. Power off.
b. Reset command (FF).
(IV). Z-axis Input Function :
(a) Photo couples input : Z-axis counter accumulates the Z1, Z2 phase changed by movement.
(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.
(c) The relationship between the value and the transmission rate as follows :
* This specification are subject to be changed without notice.
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EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
Value
Rate per second
1
2
3
4
5
6
7
2.7
6.4
9.2
12.8
15
18
20
(d) 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 voltage as folllows :
Value
Voltage
0
1
2
3
4
5
6
7
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↑
Under VDD=5V condition.
(e) Mechanical mode : The same as optical wheel mode.
6.28.1999
* This specification are subject to be changed without notice.
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2-IN-ONE SCROLLING MOUSE CONTROLLER
ABSOLUTE MAXIMUM RATINGS
Parameter
Ratings
Unit
Min.
0
-65
-0.3
-
Max.
70
150
7.5
Temperature under bias
Storage temperature range
Supply voltage
°C
°C
V
Power dissipation
500
mW
DC ELECTRICAL CHARACTERISTICS (TA=25°C to 70°C)
Parameters
Sym.
Min.
Typ.
Max.
Unit
X1,X2,Y1,Y2,Z1,Z2 (photo mode)
low input reference current
X1,X2,Y1,Y2,Z1,Z2 (photo mode)
high input reference current
IPL
70
-
-
µA
µA
V
IPh
-
-
-
-
-
-
-
-
-
-
-
-
-
106
1.2
2.1
1.5
-
X1,X2,Y1,Y2,Z1,Z2 (photo mode)
VPI1
VPI2
Vail
Vaih
Vs
0.8
1.5
-
input current
(input impedance) (80µA)
X1,X2,Y1,Y2,Z1,Z2 (photo mode)
V
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
OPT
V
3.5
-0.3
18
-18
4.5
0
V
+0.3
56
V
Imi
Ixi
µA
µA
V
(Vin=5V)
-56
-
input current
OPT
Vopt
Iil
high output current
L,M,R,X1,X2,Y1,Y2,Z1,Z2
input leakage current
OPT
input leakage current
OSC.OUT
(Iopt=20mA)
(Vin=0V)
-1.0
1.0
3.6
µA
µA
mA
Iih
0
(Vin=5V)
Iosc
3
Sink current
* This specification are subject to be changed without notice.
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2-IN-ONE SCROLLING MOUSE CONTROLLER
PS/2 mouse mode : (TA=25°C to 70°C)
Parameters
Sym.
Min.
Typ.
Max.
Unit
Operating voltage
Operating current
VDD
IOp
4.5
-
5
-
5.5
1
V
(no load)
mA
V
CLK, DATA
Vt+
3.2
-
3.8
postive-going threshold voltage
CLK, DATA
negative-going threshold voltage
DATA, CLK
input current
DATA,CLK
Vt -
Idc
1.2
0.56
-
-
-
-
1.9
1.86
0.4
V
mA
V
(Vin=0V )
(Iprl=-2mA)
Vprl
low output voltage
Serial mouse mode : (TA=25°C to 70°C)
Parameters
Sym.
Min.
Typ.
Max.
Unit
Operating voltage
VDD
VRTS
Iop1
Iop2
Irts1
Irts2
Irh
Irl
Vrts+
Vrts-
4
-
-
3
-
4
2
-
5.6
12.2
6.2
13
1
-
1.8
-
-
-2
-
V
V
Operating current
Operating current
(VDD=5.4, RTS=VDD)
-
-
-
-
-
-
-
-
mA
mA
mA
mA
mA
mA
V
(VDD=6.2, RTS=VDD)
(VDD=5.6, RTS=11V)
(VDD=5.4, RTS=12.5V)
(Vrh=Vrts-2.6V)
RTS operating current
RTS operating current
RXD high output voltage
RXD low output voltage
RTS high input voltage
RTS low input voltage
(Vrl=Vss+2.6V)
9.6
-
6.8
V
* All parameters in above table are compared with VSS.
AC ELECTRICAL CHARACTERISTICS (TA=25°C to 70°C)
PS/2 mouse mode :
Parameters
Sym.
Min.
Typ.
Max.
Unit
Oscillating Frequency
Key Debounce
Fosc
37.0-3%
37.0
37.0+3%
KHz
Tkd
Tr
-
12
-
-
-
-
-
-
-
ms
us
us
us
us
us
Rising Edge Crossed Width
Falling Edge Crossed Width
Mouse CLK Active Time
13.5
Tf
13.5
-
Tmca
Tmci
Tmdc
-
-
-
40.5
40.5
13.5
Mouse CLK Inactive Time
Time that Mouse Sample DATA from
CLK rising Edge
System CLK Active Time
Tsca
Tsci
Tsdc
Tscd
Tpi
-
-
40.5
40.5
13.5
27.0
-
-
-
us
us
us
us
us
System CLK Inactive Time
Time from DATA Transition to Falling Edge of CLK
-
-
Time from rising Edge of CLK to DATA Transition
Time to mouse Inhibit after the 11th CLK to
ensure mouse does not start another Transmission
-
0
-
50
6.28.1999
* This specification are subject to be changed without notice.
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EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
Serial mouse mode :
Parameters
Sym.
Min.
Typ.
Max.
Unit
Oscillating Frequency
Key Debounce
Fosc
Tkd
Tr
32.4-3%
32.4
32.4+3%
KHz
ms
us
-
13
-
-
-
-
Rising Edge Crossed Width
Falling Edge Crossed Width
Transmission Time
15.4
15.4
-
-
-
Tf
us
Tmx
33.33
ms
Start bit Time
Data bit time
Stop bit Time
Ts
Td
Tp
-
-
-
833.3
833.3
833.3
-
-
-
us
us
us
Mode code delay Time
Trd
11
-
14
ms
X1, X2,Y1,Y2, Z1, Z2 (photo mode) Input Impedance
16.0K
Max.
15.0K
14.0K
Typ.
13.0K
12.0K
11.0K
Min.
10.0.K
9.0K
8.0K
7.0K
6.0K
5.0K
4.0K
3.0K
2.0K
1.0K
0
2.0
4.0
1.0
3.0
5.0
10.0M
VOLTS (LIN)
* This specification are subject to be changed without notice.
6.28.1999
13
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
TIMING DIAGRAM
(A) PS/2 mouse mode :
(A) Photo-couples pulse width
X1(Y1)
X2(Y2)
Tr
Tf
(B) Receiving Data
1st
CLK
2nd
CLK
9th
CLK
10th
CLK
11th
CLK
Inhibit
CLK
Tmca
Tmdc
Tmci
DATA
Stop
Bit
Line
Control
Bit
Start
Bit
Parity
Bit
Bit0-Bit7
(C) Sending Data
10th
1st
2nd
11th
CLK
CLK
CLK
CLK
CLK
Tsci
Tsca
Tpi
Tscd
Tsdc
DATA
Stop
Bit
Start
Bit
Parity
Bit
Bit0-Bit7
6.28.1999
* This specification are subject to be changed without notice.
14
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
(B) Serial mouse mode :
(A) RXD output :
Key in/release
Mouse RXD
Tmx
Tmx
(B) Bytes structure :
RXD
1st
2rd
3nd
4nd
(C) Bits structure :
RXD LINE
Data Bit no.
0
1
2
3
4
5
6
0 1
Ts Td Td Td Td Td Td Td TP Tp
(D) PnP ID code echo timing :
RTS
> <
Trd
RXD
4D 5A 40 00 00 00 08
PnP ID code 09
"4D" code
Bit no
Ts 0
1
2
3
4
5
Tp Tp
* This specification are subject to be changed without notice.
6.28.1999
15
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
APPLICATION CIRCUIT
6.28.1999
16
* This specification are subject to be changed without notice.
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
* This specification are subject to be changed without notice.
6.28.1999
17
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
6.28.1999
18
* This specification are subject to be changed without notice.
EM84520
2-IN-ONE SCROLLING MOUSE CONTROLLER
* This specification are subject to be changed without notice.
6.28.1999
19
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