w83l786nr Winbond Electronics Corp America, w83l786nr Datasheet - Page 13

• Manufacturer Part Number: w83l786nr
• Description: W83l786nr W83l786ng Winbond H/w Monitoring Ic
• Manufacturer: Winbond Electronics Corp America

7. FUNCTIONAL DESCRIPTION
7.1
The W83L786NR/NG provides 3 analog voltage inputs, 2 fan speed inputs and outputs which support
both PWM (Pulse Width Modulation) fan control and DC (Direct Current) fan control, all of them being
implemented with S
thermal diode sensor or remote temperature sensor. W83L786NR/NG is I
compatible. Furthermore, the Watch Dog Timer will monitor every function and store the values to
registers for comparison with preset ranges. If the monitored value exceeds the limit value, the
interrupt status will be set to 1 and W83L786NR/NG will issue interrupt signals such as INT# and IRQ
if not masked. W83L786NR/NG also provides software and hardware Watch Dog Timer to avoid
system hang on.
7.2
The W83L786NR/NG provides I
the I
01011100b.
7.3
(a) Serial bus writes to internal address register followed by the data byte
2
C address default value is 01011110b (Pin 6 pull high). If Pin 6 pulls low, the I
General Description
Access Interface
The First Serial Bus Access Timing
SCL
SDA
Start By
Master
0
0
MART
Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte
1
Serial Bus Address Byte
F
0
AN
SCL
SDA (Continued)
Frame 1
TM
1
(Continued)
2
I and S
C Serial Bus for microprocessor to read/write internal registers, and
1
0
MART
1
R/W
0
F
7
D7
AN
- 8 -
792D
TM
Ack
8
D6
by
W83L786NR/ W83L786NG
II, and 2 sets of thermal inputs for CPU/GPU
0
D7
D5
D6
D4
Internal Index Register Byte
D5
D3
Data Byte
Frame 3
Frame 2
D4
D2
D3
D1
D2
7
D0
2
792D
784R
D1
8
Ack
Ack
C / SMBus interface
by
by
2
C address value is
7
D0
Master
Stop
by
792D
Ack
8
by