Mouse PS2 pinout diagram pinouts. Data transmission from the mouse to the computer is done as in figure 1, each clock period is usually between 7. Select-PS-2-Compatible-Mouse-from-the-list-and-click-Next.png' alt='Mouse Ps/2 Driver' title='Mouse Ps/2 Driver' />The data line transition is made on the falling edge of the clock signal and is usually sampled when the clock is low. Each data packet is composed of 1. Note Direction is Computer relative Mouse. Data. Mouse data packets or keyboard scan codes are sent from the mouse or keyboard to the computer on this single wire serially. Save Game Gta Sa. Clock. This signal is sent from the mouse or keyboard to synchronise the data signal. Vdc. This is a simple 5 volts signal for giving power to the mouse or keyboard. Ground. This is a common ground signal used as a return path for data and is a reference to logical 0. When the PS2 mouse sends its information it must send 3 consecutive data packets in a row. Each packet sent has different information for button pressed, movement and direction of movement. The table below shows what information is sent in each packet. Please remember that this information is of general nature and can change from one manufacturer to another. This is for a 2 button mouse. I have no idea what bit is used for other types of mice, like those with 3 buttons or with scrolling wheels. D7. D6. D5. D4. D3. D2. D1. D0. 1st. YVXVYSXS1. Visit Microsoft Acessories to compare computer mouse features and select the best Microsoft mouse for your needs. When your Logitech wireless mouse stops working, you can check if the USB port is broken, if the mouse driver is corrupted, if the batteries are discharged, etc, then. The most downloaded Mouse Drivers, including Mouse Driver Update Utility, Microsoft IntelliMouse Optical USB and Logitech USB TrackMan Wheel. A friend gave me a broken HP Pavilion laptop. With just a little work, you can remove the trackpad and connect to a PS2 or 9pin Serial port. Connect to your PC. RL2nd. X7. X6. X5. X4. X3. X2. X1. X0. Y7. Y6. Y5. Y4. Y3. Y2. Y1. Y0. LLeft Button State 1 pressed downRRight Button State 1 pressed downX0 X7. Movement in the X direction. Y0 Y7. Movement in the Y direction. XSDirection of movement in the X axis 1 UPYSDirection of movement in the Y axis 1 LEFTXV,YVOverflow in the movement data bits 1 overflow has occuredThe X and Y direction bits send the number of bits you moved since the last time this information was sent, the actual direction of the movement is sent in the XS and XY bits. If the movement of the mouse was higher than 2. The way the driver handles overflow can change from one mouse driver to another, some may move the pointer 2. Mouse Ps/2 Driver' title='Mouse Ps/2 Driver' />Some of you might wonder what exactly are the data bits sent for the movement bits, you will be able to shortly find this out in the io devices section on mice which will be online shortly PS2 lt COM MOUSE ADAPTERSMany of you asked how to connect serial mice to PS2 ports and vice versa. This is a very touchy subject and I wouldnt recommend to anyone to go ahead and try make these adapters on your own risk. Most mice are either built for PS2 or serial ports and some are built for both, in the later case the appropriate adapters are supplied with the mouse when you buy it or can be purchased as an option. Recently one of the Microsoft Updates, I believe, has done something to mess with my Logitech USB Optical Mouse. I have tried installing an updated mouse driver. Here. Because of the nature of the ports the two kinds of mice are not directly compatible. They dont send out the information in the same matter different protocols and dont use the same signal levels, PS2 mice uses TTL logic signals 0 5 volts and serial mice use RS2. Power is also different for COM and PS2 mice both purpose mouse must accept 2. When a COM mouse is built for operation on both ports, it comes with the 9 pin D Shell used in serial mice. These connectors have 9 pins and the serial mouse only uses between 5 and 8 pins. This leaves us with at least 1 spare line, this is the line that the PS2 data portion of the mouse will use for sending its information. So as you can see, the adapters are designed to work on a particular make and model and are not usually compatible with other mice. Some sources refer to this adapter which is, probably, most often used COM mouse name. COM PS2 PS2 namepower 51. Vextra PS2 data pin. Data. TXDGND35. Gndextra PS2 clock pin. Madden 2004 Pc'>Madden 2004 Pc. Back In Black Guitar Sheet Music. Clock. When a PS2 mouse is built for operation on both ports, things are little better. Most PS2 COM compatible mice use PS2 pins 2 and 6 to provide extra lines for COM compatibility. This assumes the following adaptor PS2 mouse name. PS2 COM COM name. GND3. 5GNDextra COM Rx. D2. 2Rx. Dextra COM Tx. D6. 3Tx. Dpower 51. RTSIn both cases, there is just chances any of these adaptors will work. If pins 2 and 6 in a PS2 mouse are not connected to anything this can be checked with a multitester, PS2 mouse has no COM support. Mouse resolution and tracking rate. The standard PS2 mouse with Logitech mouse defaults to 1. CPI and can be switched to 4. CPI with software. Microsoft mouse driver for Windows 3. Windows 9. 5 defauls to 1. The maximum tracking rate for PS2 mouse is 4. For 1. 00 CPI mouse this would indicate maximum trackign rate of 1. CPI mouse only 2. Bi directional transmission is controlled by the CLK and DATA lines. Both are fed by an open collector device which lets either host or mouse force the line to 0. During non transmission, CLK is at 1 and DATA can be at 0 or 1. The host can inhibit mouse transmission by forcing CLK to 0. If the host inhibits the mouse while it is transmitting, the byte must be retransmitted if the inhibit state arrived before the 1. There is a simple description in my old IBM PS2 model 5. The mouse interface is the same as the keyboard interface. The Intel 8. 04. 2 supports two channels, one for keyboard and one for the auxiliary device mouse, trackball, touchpad. Mouse Ps/2 Driver' title='Mouse Ps/2 Driver' />Pin 1 is the data, pin. V and pin 5 clock. Receiving data Check clock. If inactive, there is a bit on the data line. Each transmission unit is one start bit, eight data bits, odd parity and one stop bit. Start bits are low, stop bits high. Each clock active or inactive period is 3. Data transition to falling edge of clock is 5 to 2. Sending Check that both clock and data are high. Pull down data for start bit, and start clocking. NOTE Logitech has made their own extension also to this protocol to allow three buttons. Mouse movement detectors. The most tyical construction of mouse movement detectors are optomechanical detectors. The system works so that X and Y movement of the mouse rotates slotted disks. The movement info is then picked from those slotted disks using optical sensors. There are two sensors for each slotted disk and those sensors give out two singals which are 9. So if we call the getting light phase 1, and the not getting light phase when the light is blocked by the wheel 0 then it looks like this. This can be decoded into four discrete bit pairs for the two sensors. Forward direction Backwards direction. This information can be easily decoded usign small microcontroller and then sent to computer in correct format.