Rev. 3.0, 03/01, page 258 of 390
CLK
DATA
t
9
I/O
inhibit
1st
CLK
2nd
CLK
9th
CLK
10th
CLK
11th
CLK
Start bit
bit 0
Parity bit
Stop bit
t
7
t
8
Figure 17.4 Data Send Timing
Table 17.3
Data Send Timing Parameters
Timing Parameter
Explanation
Min (us)
Max (us)
t
7
Duration of CLK inactive
30
50
t
8
Duration of CLK active
30
50
t
9
Time from inactive to active CLK transmission, used
to time when the keyboard samples DATA
5
25
17.6
CAUTION
System cannot recognize mouse without confirmation using data-packet between system and
mouse.
[Example]
1.
System resets PS/2 mouse sending 0xff.
2.
System wait to receive ACK.
3.
Wait
4.
System send command
5.
System wait to receive ACK.
:
:
:
Summary of Contents for HD64465
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