sc84512 Silan, sc84512 Datasheet - Page 6

• Manufacturer Part Number: sc84512
• Description: Ps/2 3d Scrolling Mouse Controller
• Manufacturer: Silan

(B) PS/2 Mouse Data Report
(C) PS/2 mouse Data Transmission
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
(b) Stream Mode:
(c) Remote Mode:
(d) Wrap Mode:
(a) In stream mode: A data report is sent at the end of a sample interval.
(b) In remote mode: A data report is sent in response to Read Data command.
(c) Data report format:
(a) SC84512 generates the clocking signal when sending data to and receiving data from the system.
(b) The system requests SC84512 receive system data output by forcing the DATA line to an inactive level and
(c) Data transmission frame:
(d) Data Output and Input:
The maximum rate of transfer is the programmed sample rate.
Data report is transmitted if
a. switch is pressed
b. movement has been detect
Data is transmitted only in response to a Read Data command.
Any byte of data sent by the system, except hex EC (Reset wrap mode) or hex FF (Reset), is returned by
SC84512.
and no transmission are started by SC84512 until CLK and DATA both high. DATA is valid at the falling
edge of CLK and is read by system at the rising edge of CLK.
intervals not to exceed 100 sec. During data transmission, if system lowers CLK before the rising edge of
allowing CLK line to go to an active level.
If required to send data (When CLK is high and DATA is low), SC84512 receive data from the system.
During transmission, SC84512 check for line contention by checking for an inactive level on CLK at
Byte
1
2
3
2~9
Bit
10
11
1
0~7
0~7
Bit
0
1
2
3
4
5
6
7
Start bit (always 0)
Data bits (D0~D7)
Parity bit (odd parity)
Stop bit (always 1)
Left button status; 1 = pressed
Right button status; 1 = pressed
Middle button status; 1 = pressed
Reserve
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)
Function
Description
REV: 1.0
SC84512
Page 6 of 12
2005.04.22