Silan

Semiconductors

SC84510

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2000.12.31

8

(D) PS/2 Mouse Error Handling:

(a) A Resend command (FE) following receipt of an invalid input or any input with incorrect parity.

(b) If two invalid input are received in succession, an error code of hex FC send to the system.

(c) The counter accumulators are cleared after receiving any command except “Resend”.

(d) SC84510 receives a Resend command (FE), it transmit its last packet of data.

(e) In the stream mode “Resend” is received by SC84510 following a 3-byte data packet transmission to the

system. SC84510 resend the 3-byte data packet prior to clearing the counter.

(f) A response is sent within 25 ms if

a The system requires a response

b An error is detected in the transmission

(g) When a command requiring a response is issued by the system, another command should not be issue until

either the response is received or 25ms has passed.

(E) PS/2 Mouse Commands Description:

There are 16 valid commands that transmits between the system and SC84510. The “FA” code is always the

first response to any valid input received from the system other than a Set Wrap Mode or Resend command. The

following table list the commands:

The following describes valid commands:

Hex Code

Command

SC84510 echo code

FF

Reset

FA, AA, 00

FE

Resend

XX, (XX, XX)

F6

Set Default

FA

F5

Disable

FA

F4

Enable

FA

F3, XX

Set Sampling Rate

FA, FA

F2

Read Device Type

FA, 00

F0

Set Remote Mode

FA

EE

Set Wrap Mode

FA

EC

Reset Wrap Mode

FA

EB

Read Data

FA, XX, XX, XX

EA

Set Stream Mode

FA

E9

Status Request

FA, XX, XX, XX

E8, XX

Set Resolution

FA, FA

E7

Set Auto-speed

FA

E6

Reset Auto-speed

FA