NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 156

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

The keyboard Wake-Up function is enabled by setting Logical Device A, CR[E0h], bit 6 to “1”.
There are two keyboard events that can be used for the wake-up
1) Any key – Set bit 0 at Logical Device A, CR[E0h] to “1” (Default).
2) Specific keys (Password) – Set bit 0 at Logical Device A, CR[E0h] to “0”.
Three sets of specific key combinations are stored at Logical Device A. CR[E1h] is an index register to indicate
which byte of key code storage (0x00h ~ 0x0Eh, 0x30h ~ 0x3Eh, 0x40h ~ 0x4Eh) is going to be read or written
through CR[E2h]. According to IBM 101/102 keyboard specification, a complete key code contains a 1-byte make
code and a 2-byte break code. For example, the make code of “0” is 0x45h, and the corresponding break code is
0xF0h, 0x45h.
The approach to implement Keyboard Password Wake-Up Function is to fill key codes into the password storage.
Assume that we want to set “012” as the password. The storage should be filled as below. Please note that index
0x09h ~ 0x0Eh must be filled as 0x00h since the password has only three numbers.
Index(CRE1)
D a t a (CRE2)
13.2.2
The mouse Wake-Up function is enabled by setting Logical Device A, CR[E0h], bit 5 to “1”.
The following specific mouse events can be used for the wake-up:
Three control bits (ENMDAT_UP, MSRKEY, MSXKEY) define the combinations of the mouse wake-up events.
Please see the following table for the details.
Any button clicked or any movement
One click of the left or the right button
One click of the left button
One click of the right button
Two clicks of the left button
Two clicks of the right button.
Waken up by Mouse events
1E
00
01
F0
1E
02
03
16
F0
04
05
16
06
45
07
F0
08
45
-147-
W83627UHG/NCT6627UD
09
00
0A 0B 0C 0D 0E
First-pressed key “0”
Second-pressed key “1”
Third-pressed key “2”
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Publication Release Date: October 26, 2010
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Revision 1.7