W83977EF Winbond Electronics Corp America, W83977EF Datasheet - Page 81

• Manufacturer Part Number: W83977EF
• Description: Description = W83877TF Plus Kbc, GP I/O, Wake-Up, Power Fail Resume ;; Package = QFP 128
• Manufacturer: Winbond Electronics Corp America

6.6
Winbond's unique programmable keyboard/ mouse Wake-Up functions provide the system diversified
methods for either OnNow Wake-Up application, or security control application. The keyboard or
mouse can Wake-Up the system by producing a panel switch low pulse on PANSWOT# pin, and
connect it to chipset (for example Intel
conditions can be programmed as pre-determined or any keys/buttons. To implement this function, a
32.768KHz crystal must be installed between XTAL1 and XTAL2, or a 32.768KHz clock to be
connected to XTAL1 and leave XTAL2 open. The V
power supply, and an external battery should be installed on V
passwords and Wake-Up status which had been set already) when power fails.
The keyboard Wake-Up function is enable by setting LD-0A CR-E0 bit 6. The pre-determined keys
data are stored in registers, and they can be access by an indirection method. At first, write their index
address to LD-0A CR-E1, then access them by reading/writing LD-0A CR-E2. A zero data is written
to the register means the comparison of this register will be ignored. The pre-programmed keys may
be 1 to 5 keys with various combinations. If LD-0A CR-E0 bit 0 is set, the system will be waken up
after any key struck.
To implement this function, the bit 7 of LD-0A CR-E0 must be set, and panel switch input is connected
to PANSWIN# pin. Thus PANSWIN# is blocked to PANSWOUT#, by setting LD-0A CR-E0 properly
and make only keyboard can Wake-Up the system with preset keys (password).
The mouse Wake-Up function is activated by setting bit 5 of LD-0A CR-E0. If bit 1 of LD-0A CR-E0 is
set, any movement or button clicking will make up the system. Otherwise, the mouse can Wake-Up
the system only by clicking its button twice successively with the mouse unmoved. The bit 4 of LD-0A
CR-E0 determines which button (left or right) to perform Wake-Up function.
6.6.1
6.6.2
6.6.3
---- Programmable Keyboard / Mouse Wake-Up Functions
OnNow / Security Keyboard and Mouse Wake-Up
Keyboard Wake-Up Function
Mouse Wake-Up Function
Keyboard Password Wake-Up Function
TM
chipset TX, LX PIIX4) panel switch input. The Wake-Up
-75 -
SB
pin must be connected to +5V V
Publication Release Date: April 2003
BAT
pin to store the data (the
W83977EF
Revision 1.1
SB
of ATX