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W83781D Datasheet(PDF) 33 Page - Winbond |
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W83781D Datasheet(HTML) 33 Page - Winbond |
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33 / 54 page  W83781D/W83781G Publication Release Date: April 14, 2005 - 29 - Revision 2.0 7 6 5 4 3 2 1 0 FANINC1 FANOPV1 FANINC2 FANOPV2 FANINC3 FANOPV3 GPOSEL DIS_ABN Bit 7: Disable power-on abnormal the monitor voltage including V-Core A,, and +3.3V. If these voltage exceed the limit value, the pin (Open Drain) of BEEP will drives low and high frequency signal. Write 1, the frequency will be disable. Default 0. After power on, the system should set this bit to 1 in order to disable BEEP. Bit 6: BEEP/GPO# Pin Function Select. Write 1 Select GPO# function. Set 0, select BEEP function. This bit default 0. Bit 5: FAN 3 output value if FANINC3 sets to 0. Write 1, then pin 18 always generate logic high signal. Write 0, pin 18 always generates logic low signal. This bit default 0. Bit 4: FAN 3 Input Control. Set to 1, pin 18 acts as FAN clock input, which is default value. Set to 0, this pin 18 acts as FAN control signal and the output value of FAN control is set by this register bit 5. This output pin can connect to power PMOS gate to control FAN ON/OFF. Bit 3: FAN 2 output value if FANINC2 sets to 0. Write 1, then pin 19 always generate logic high signal. Write 0, pin 19 always generates logic low signal. This bit default 0. Bit 2: FAN 2 Input Control. Set to 1, pin 19 acts as FAN clock input, which is default value. Set to 0, this pin 19 acts as FAN control signal and the output value of FAN control is set by this register bit 3. This output pin can connect to power NMOS gate to control FAN ON/OFF. Bit 1: FAN 1 output value if FANINC1 sets to 0. Write 1, then pin 20 always generate logic high signal. Write 0, pin 20 always generates logic low signal. This bit default 0. Bit 0: FAN 1 Input Control. Set to 1, pin 20 acts as FAN clock input, which is default value. Set to 0, this pin 20 acts as FAN control signal and the output value of FAN control is set by this register bit 1. This output pin can connect to power PMOS gate to control FAN ON/OFF. 8.18 Register 50h ~ 5Fh Bank Select – Index 4Eh (No Auto Increase) (Bank 0) Register Location: 4Eh Power on Default Value <6:3> = Reserved, <7> = 1, <2:0> = 0. Reset by MR Attribute: Read/Write Size: 8 bits |
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