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PDF HT6523 Data sheet ( Hoja de datos )
| Número de pieza | HT6523 | |
| Descripción | PS/2 Mouse Controller | |
| Fabricantes | Holtek Semiconductor Inc | |
| Logotipo |  |
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HT6523
PS/2 Mouse Controller
Features
· Compatible with IBM PS/2 mouse
· Integrated oscillator circuit with external resistor
· 6MHz clock frequency
· Minimal external components
· Three key-switches and four photo-coupler inputs
· Supports test mode operation
· 16-pin DIP package
General Description
The HT6523 is a PS/2 compatible mouse controller IC.
Capable of driving up to 3 key-switches and 4
photo-couplers directly into a 6-pin connector line.
Pin Assignment
NC
TEST
RESET
O SC
NC
C LK
D ATA
VSS
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
H T6523
1 6 D IP -A
VDD
Y2
Y1
X2
X1
LB
MB
RB
Pin Description
Pin No. Pin Name
1, 5 NC
2 TEST
3 RESET
4 OSC
6 CLK
7 DATA
8 VSS
9 RB
10 MB
11 LB
12 X1
13 X2
14 Y1
15 Y2
16 VDD
I/O Description
¾ No connection
I
If TEST is floating or connected to VSS, then the chip is under normal opera-
tion. If TEST is connected to VDD, it will operate under the TEST mode.
I Input to reset internal LSI
I
OSC is connected to an external resistor then to VDD to generate a 6MHz sys-
tem clock.
I/O
Synchronous clock signal. The mouse generates a clock signal when sending
data to and receiving data from the system.
I/O Bidirectional data transmission line
¾ Negative power supply, ground
In the non-active state these 3 switch inputs are pulled low. To activate they
must be connected to VDD.
I In the TEST mode, MB, LB will indicate the condition of the X1, X2 inputs, if RB
is left floating or connected to VSS. Also in the TEST mode, if RB is connected
to VDD then MB and LB will indicate the condition of the Y1 and Y2 inputs.
I
Mouse interface input terminal. Four photo-coupler signals denote UP, DOWN,
LEFT and RIGHT state.
¾ Positive power supply
Rev. 1.20
1 March 6, 2003
1 page  
HT6523
Hex Code Command
Description
F0
Set remote mode
This command sets the remote mode. Data values are reported only in response to
a Read Data command.
EE
Set wrap mode
This command sets the wrap mode. This mode remains until hex FF or hex EC is
received.
EC Reset wrap mode This command resets the wrap mode
This command requests that all data defined in the data packet format be transmit-
ted. This command is executed in either remote or stream mode. The data is trans-
EB Read data mitted even if there has been no movement since the last report or the switch status
is unchanged. Following a Read Data command, the accumulators are cleared af-
ter a data transmission.
EA Set stream mode This command sets the stream mode
When this command is issued by the system, the mouse responds with a 3-byte
status report as follows:
Byte
Bit
Description
3
2
1
E9 Status request
0~7 Current sampling rate
0~7 Current resolution setting
7 always = 0
6 0 = Stream mode, 1 = Remote mode
5 0 = Disabled, 1 = Enabled
4 0 = Scaling 1:1, 1 = Scaling 2:1
3 always = 0
2 1 = Left button pressed
1 Reserved for middle button
0 1 = Right button pressed
E8, XX Set resolution
The mouse provides four resolutions selected by the second byte of this command
as follows:
Second Byte
hex XX
hex 00
hex 01
hex 02
hex 03
Resolution (Counts per mm)
200 DPI
320 DPI
400 DPI
11
23
46
8 12
2
4
8
16
Scaling is used to provide a course/fine tracking response. At the end of a sample
interval in the stream mode, the current X and Y data values are converted to new
values. The sign bits are not involved in this conversion. 2:1 scaling is only per-
formed in stream mode. In response to a Read Data command, the mouse will
transmit the current value before conversion.
Input
Output
E7 Set scaling 2:1
0
1
2
3
4
5
N (³6)
0
1
1
3
6
9
2.0 ´ N
E6
Reset scaling
This command restores 1:1 scaling
Rev. 1.20
5 March 6, 2003
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet HT6523.PDF ] | |
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