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參數(shù)資料
| 型號： | MTA41300/SO |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PDSO18 |
| 封裝： | 0.300 INCH, PLASTIC, SOIC-18 |
| 文件頁數(shù)： | 23/28頁 |
| 文件大?。?/td> | 466K |
| 代理商： | MTA41300/SO |
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MTA41300
DS40101C-page 4
1995 Microchip Technology Inc.
2.0
SERIAL MOUSE MODE
OPERATION
When operating in serial mouse mode the MTA41300
mouse controller
is a t
ransmit only device. The
MTA41300 transmits a fixed format data packet at
1200 baud to the host when a button press or mouse
motion is detected.
2.1
Reset Initialization
The
MTA41300
will
transmit
a
“M”
character
immediately after power-up or when a reset is initiated
by the host. This character notifies the host that the
message format is Microsoft serial format compliant.
The MTA41300 is placed in the reset state when the
MCLR pin is driven low.
2.2
Serial Mode Message Format
The following Microsoft serial interface compliant data
format is broadcast by the MTA41300 when transmit-
ting data to the host. The 1200 baud data format uti-
lizes a 9-bit data frame that consists of 7 bits of
message data and 2 control bits.
Data Frame Format:
Bit
Description
1
Start Bit (always 0)
2
Message Data Bit0, LSB
3
Message Data Bit1
4
Message Data Bit2
5
Message Data Bit3
6
Message Data Bit4
7
Message Data Bit5
8
Message Data Bit6, MSB
9
Stop bit (always 1)
The
MTA41300
mouse
controller
transmits
the
following three-byte Microsoft serial interface compliant
data packet in response to a mouse event.
Message Data Byte 1:
Bit
Description
6
Always = 1 (message sync bit)
5
1 = Primary Button Depressed
4
1 = Secondary Button Depressed
3
Vertical Motion bit 7 (MSB)
2
Vertical Motion bit6
1
Horizontal Motion bit7 (MSB)
0
Horizontal Motion bit6
Message Data Byte 2:
Bit
Description
6
Always = 0
5
Horizontal Motion bit5
4
Horizontal Motion bit4
3
Horizontal Motion bit3
2
Horizontal Motion bit2
1
Horizontal Motion bit1
0
Horizontal Motion bit0
Message Data Byte 3:
Bit
Description
6
Always = 0
5
Vertical Motion bit5
4
Vertical Motion bit4
3
Vertical Motion bit3
2
Vertical Motion bit2
1
Vertical Motion bit1
0
Vertical Motion bit0
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