参数资料
型号: W83L786NR
厂商: WINBOND ELECTRONICS CORP
元件分类: 通信及网络
英文描述: SPECIALTY TELECOM CIRCUIT, PDSO20
封装: 0.209 INCH, SSOP-20
文件页数: 5/50页
文件大小: 998K
代理商: W83L786NR
W83L786NR/ W83L786NG
- 8 -
7. FUNCTIONAL DESCRIPTION
7.1 General Description
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 SMART FAN
TM I and SMART FANTM II, and 2 sets of thermal inputs for CPU/GPU
thermal diode sensor or remote temperature sensor. W83L786NR/NG is I
2C / SMBus interface
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 Access Interface
The W83L786NR/NG provides I
2C Serial Bus for microprocessor to read/write internal registers, and
the I
2C address default value is 01011110b (Pin 6 pull high). If Pin 6 pulls low, the I2C address value is
01011100b.
7.3 The First Serial Bus Access Timing
(a) Serial bus writes to internal address register followed by the data byte
0
Start By
Master
010
11
01
D7
D6
D5
D4
D3
D2
D1
D0
Ack
by
792D
R/W
Ack
by
792D
SCL
SDA
D7
D6
D5
D4
D3
D2
D1
D0
Ack
by
784R
Stop
by
Master
SCL
SDA (Continued)
78
0
7
8
0
78
Frame 2
Internal Index Register Byte
(Continued)
Frame 3
Data Byte
Frame 1
Serial Bus Address Byte
Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte
Ack
by
792D
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