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PDF UT84520 Data sheet ( Hoja de datos )
| Número de pieza | UT84520 | |
| Descripción | PS/2 SCROLLING MOUSE CONTROLLER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UTC UT84520
PS/2 SCROLLING MOUSE CONTROLLER
DESCRIPTION
The UT84520 Scrolling Mouse Controller is specially
designed to control PS/2 mouse device．This single chip can
interface with three key-switches and 4X-Y photo-couples plus
Z-axis directly to 8042 controller．
There are four types of Z-axis inputs used to implement
scrolling mouse functionality．
FEATURES
*Using 50KΩ+5% resistor for RC oscillation．
*Compatible with legacy PS/2 mouse．
*Compatible with Microsoft PS/2 scrolling mouse．
*Built-in noise immunity circuit．
*The sampling rate of motion detector is up to 65KHz．
*Built-in three step dynamic input impedance．
*Three key-switches and four photo-couples inputs．
*Photo couple test mode included﹒
*Low power dissipation．
*Two types Z direction input:
1.Photo couples input
2.Mechanical input
CMOS IC
DIP-16
UTC
UNISONIC TECHNOLOGIES CO., LTD. 1
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1 page  
UTC UT84520
AC Electrical Characteristics (Ta = 25 ℃ to 70 ℃)
PARAMETER
Oscillating Frequency
Key Debounce
Rising Edge Crossed Width
Falling Edge Crossed Width
Mouse CLK Active Time
Mouse CLK Inactive Time
Time that Mouse Sample DATA from
CLK rising Edge
System CLK Active Time
System CLK Inactive Time
Time from DATA Transition to Falling
Edge of CLK
Time from rising Edge of CLK to DATA trasition
Time to mouse Inhibit after the 11th CLK to ensure mouse
does not start another Transmission
SYMBOL
Fosc
Tkd
Tr
Tf
Tmca
Tmci
Tmdc
Tsca
Tsci
Tsdc
Tscd
Tpi
MIN
37-3%
13.5
13.5
0
CMOS IC
TYP
37
12
40.5
40.5
13.5
40.5
40.5
13.5
27.0
MAX
37+3%
UNIT
KHz
ms
µs
µs
µs
µs
µs
µs
µs
µs
µs
50 µs
Timing Diagram
(A) Photo-couples pulse width
X1(Y1)
X2(Y2)
Tr
Tf
UTC
UNISONIC TECHNOLOGIES CO., LTD. 5
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UTC UT84520
CMOS IC
b).Resend (FE)
a). Any time UT84520 receives an invalid command, it returns a Resend command to the system.
b). When UT84520 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 UT84520 immediately following a 3-byte data packet
transmission to the system
c). Set Default (F6)
The command initializes all condition to the Power-on defaults
d). Disable (F5)
This command is used in the stream mode to stop transmissions from UT84520
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 20/sec
28 40/sec
3C 60/sec
50 80/sec
64 100/sec
C8 200/sec
g). Read Device Type (F2)
UT84520 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)
UT84520 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.
l). Set Stream Mode (EA)
This commnd sets UT84520 in stream mode.
m). Status Request (E9)
When this command is issued by the system, UT84520 respond with a 3-byte status report as following:
UTC
UNISONIC TECHNOLOGIES CO., LTD. 11
QW-R502-004,A
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet UT84520.PDF ] | |
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