W83782G Nuvoton Technology Corporation of America, W83782G Datasheet - Page 11

• Manufacturer Part Number: W83782G
• Description: IC MONITOR H/W 48-LQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83782G

• Output Type: I²C™, ISA
• Function: Hardware Monitor
• Topology: ADC, Fan Speed Counter, Register Bank
• Sensor Type: External
• Sensing Temperature: External Sensor
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Temperature Sensor Function: Temp Sensor
• Operating Temperature (min): -40C
• Operating Temperature (max): 120C
• Operating Supply Voltage (typ): 5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.2.2 I
The second interface uses I
the first address defined at CR [48h] can read/write all registers excluding Bank 1 and Bank 2
temperature sensor 2/3 registers. The second address defined at CR [4Ah] bit2-0 only read/write
temperature sensor 2 registers, and the third address defined at CR [4Ah] bit6-4 only can access
(read/write) temperature sensor 3 registers.
The first serial bus address of W83782D/G has 3 hardware setting bits set by pin47-45 when pin 43 is
set to high. The address is 00101[pin45] [pin46] [pin47]. If pin45=1, pin46=1, pin47=0, for example,
the content of CR [48h] is 0101110. If CR [4Ah] bit 2-0 is XXX, the temperature sensor 2 serial
address is 1001XXXG, in which G is the read/write bit. If CR [4Ah] bit 6-4 is YYY, the temperature
sensor 3 serial address is 1001YYYG, in which G is the read/write bit.
6.2.3 The first serial bus access timing is shown as follows:
(b) Serial bus write to internal address register only
(a) Serial bus write to internal address register followed by the data byte
SCL
SDA
SCL
SDA
2
C interface
Start By
Master
Start By
Master
0
0
0
0
Figure 3. Serial Bus Write to Internal Address Register Only
Figure 2. Serial Bus Write to Internal Address Register followed by the Data Byte
1
1
Serial Bus Address Byte
Serial Bus Address Byte
0
0
2
SCL
SDA (Continued)
C Serial Bus. In the W83782D/G has three serial bus addresses. That is,
Frame 1
Frame 1
1
1
(Continued)
1
1
0
0
1
1
R/W
R/W
7
0
0
D7
7
- 8 -
Ack
781D
Ack
781D
by
by
8
8
D6
D7
0
0
D7
D5
D6
D6
D4
Internal Index Register Byte
Internal Index Register Byte
W83782D/W83782G
D5
D5
D3
Data Byte
Frame 3
Frame 2
Frame 2
D4
D4
D2
D3
D3
D1
D2
D2
7
D0
Ack
781D
by
D1
D1
8
7
D0
7
D0
Master
Stop
by
Ack
781D
by
Ack
781D
by
8
8
Stop by
Master