W83781D Nuvoton Technology Corporation of America, W83781D Datasheet - Page 26

• Manufacturer Part Number: W83781D
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83781D

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Bit 7:
Bit 6-5: Reserved. This bit should be set to 0.
Bit 4-0: The logical 1 disables the corresponding interrupt status bit for IRQ interrupt.
8.10 VID/Fan Divisor Register – Index 47h (Bank 0)
Register Location:
Power on Default Value <7:4> is 0101, <3:0> is 0000
Attribute:
Size:
Bit 7-6: FAN2 Speed Control.
Bit 5-4: FAN1 Speed Control.
Bit 3-0: The VID <3:0> inputs
<7:6> = 00 - divide by 1;
<7:6> = 01 - divide by 2;
<7:6> = 10 - divide by 4;
<7:6> = 11 - divide by 8.
<5:4> = 00 - divide by 1;
<5:4> = 01 - divide by 2;
<5:4> = 10 - divide by 4;
<5:4> = 11 - divide by 8.
The logical 1 outputs a minimum 20 ms active low pulse on the Case Open pin. The register
bit self clears after the pulse has been output.
47h
Read/Write
8 bits
7
7
6
6
5
5
4
4
3
3
2
2
- 22 -
1
1
0
0
IN4
-IN5
-IN6
FAN3
Case Open
Reserved
Reserved
Chassis Clear
VID0
VID1
VID2
VID3
FAN1 RPM Control
FAN1 RPM Control
FAN2 RPM Control
FAN2 RPM Control
Publication Release Date: April 14, 2005
W83781D/W83781G
Revision 2.0