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W83977EF-AW Datasheet(PDF) 75 Page - Winbond |
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W83977EF-AW Datasheet(HTML) 75 Page - Winbond |
75 / 142 page W83977EF-AW/W83977EG-AW Publication Release Date: Apr. 2006 -73- Revision 1.2 8.6 OnNow / Security Keyboard and Mouse Wake-Up ---- Programmable Keyboard / Mouse Wake-Up Functions 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 IntelTM chipset TX, LX PIIX4) panel switch input. The Wake-Up 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 VSB pin must be connected to +5V VSB of ATX power supply, and an external battery should be installed on VBAT pin to store the data (the passwords and Wake-Up status which had been set already) when power fails. 8.6.1 Keyboard Wake-Up Function 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. 8.6.2 Keyboard Password Wake-Up Function 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). 8.6.3 Mouse Wake-Up Function 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. |
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