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參數(shù)資料
| 型號(hào)： | SC84520 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TWO IN ONE SCROLLING MOUSE CONTROLLER |
| 中文描述： | 二合一滾動(dòng)鼠標(biāo)控制器 |
| 文件頁(yè)數(shù)： | 8/19頁(yè) |
| 文件大小： | 185K |
| 代理商： | SC84520 |
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Silan
Semiconductors
SC84520
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2000.12.31
8
d. Wrap Mode:
Any byte of data sent by the system. Except hex EC(Reset wrap mode) or hex FF (Reset) is returned by
SC84520.
B) PS/2 Mouse Data Report:
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:
Byte
1
Bit
0
1
2
3
4
5
6
7
0-7
0-7
Description
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)
2
3
C) PS/2 Mouse Data Transmission:
a. SC84520 generates the clocking signal when sending data to and receiving data from the system.
b. The system requests SC84520 receive system data output by forcing the DATA line to an inactive level and
allowing CLK line to go to an active level.
c. Data transmission frame:
Bit
1
2-9
10
11
Function
Start bit (always 0)
Data bits (D0 – D7)
Parity bit (odd parity)
Stop bit (always 1)
d. Data Output (data from SC84520 to system):
If CLK is low (inhibit status), data is no transmission.
If CLK is high and DATA is low (request –to-send), data is update. Data is received from the system and no
transmission are started by SC84520 until CLK and DATA both high. If CLK and DATA both are high, the
transmission is ready. DATA is valid prior to the falling edge of CLK and beyond the rising edge of CLK.
During transmission, SC84520 check for line contention by checking for an inactive level on CLK at intervals
not to exceed 100
μ
s, Contention occurs when the system lowers CLK to inhibit SC84520 output after
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