EM84513 Datasheet, PDF (9/24 Pages) ELAN Microelectronics Corp – Mouse Controller

EM84513
Mouse Controller
7.1.1.2 Stream Mode
The maximum rate of transfer is the programmed sample rate.
Data report is transmitted if
switch is pressed
movement has been detect
7.1.1.3 Remote Mode
Data is transmitted only in response to a Read Data command.
7.1.1.4 Wrap Mode
Any byte of data sent by the system, except hex 0xEC ( Reset wrap mode ) or hex 0xFF
( Reset ), is returned by EM84513.
7.1.2 PS/2 Mouse Data Report
In stream mode: A data report is sent at the end of a sample interval.
In remote mode: A data report is sent in response to Read Data command.
Data report format:
Byte
Bit
1
0
1
2
3
4
5
6
7
2
0-7
3
0-7
Description
Left button status; 1 = pressed
Right button status; 1 = pressed
Middle button status; 1 = pressed
Reserve (Always 1)
X data sign; 1 = negative
Y data sign; 1 = negative
X data overflow; 1 = overflow
Y data overflow; 1 = overflow
X data (D0 – D7)
Y data (D0 – D7)
7.1.3 PS/2 Mouse Data Transmission
EM84513 generates the clocking signal when sending data to and receiving data
from the system.
The system requests EM84513 receive system data output by forcing the DATA
line to an inactive level and allowing CLK line to go to an active level.
Data transmission frame:
Product Specification ((V0.9) 06.16.2006
•5
(This specification is subject to change without further notice)