EM84502

PS/2 MOUSE CONTROLLER

6

* This specification are subject to be changed without notice.

6.18.1998

c). Set Default ( F6 )

The command reinitializes all conditions to the power-on defaults.

d). Disable ( F5 )

This command is used in the stream mode to stop transmissions from EM84502.

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 )

EM84502 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 )

EM84502 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 command sets EM84502 in stream mode.

m). Status Request ( E9 )

When this command is issued by the system, EM84502 respond with a 3-byte status report as follows:

Byte

Bit

Description

1

0

1 = Right button pressed

1

1 = Middle button pressed

2

1 = Left button pressed