W83792AG Nuvoton Technology Corporation of America, W83792AG Datasheet - Page 18

• Manufacturer Part Number: W83792AG
• Description: IC MONITOR H/W 48-LQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83792AG

• Output Type: I²C™
• Function: Hardware Monitor
• Topology: ADC, Fan Control, Register Bank
• Sensor Type: External
• Sensing Temperature: External Sensor
• Output Alarm: Yes
• 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
• Resolution: 10b
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7. FUNCTION DECRIPPTION
7.1
The W83792D/G provides 9 analog voltage inputs, 7 fan speed inputs and output controls which
support both of PWM (Pulse Width Modulation) control and DC (Direct Current) fan control, all of them
are implemented with Smart FAN
thermistor or Pentium
W83792D/G. Further more, W83792D/G provides several innovative and practical functions to make
the whole system manage more efficiently and compliant with future trend of network management,
such as ASF2.0 sensor compliant, which could remote Power on/off control the system, report the
status of thermal trip, fan, and temperature limitation. Also, it is SMBus 2.0 ARP command compatible.
VID table could be selected by hardware trapping for VRM9.0 and VRD 10 specifications. 2 sets of 6
bits of VID input/output control for dual processors and 2 sets of thermal Trip input for disable VRM
module, and for the more, once the monitoring function of W83792D/G is enabled, the watch dog will
monitor every function and store the values to registers for comparison with preset ranges. If the
monitoring value exceeds the limit value, the interrupt status will be set to 1 and W83792D/G will issue
interrupt signals such as SMI# and IRQ if they are not masked off. W83792D/G also provides software
and hardware Watch Dog Timer to avoid system hang on.
7.2
The W83792D/G provides I2C Serial Bus for microprocessor to read/write internal registers. In the
W83792D/G, there are three serial bus addresses. Through the fi
The first serial bus address of W83792D/G has 2 hardware setting bits set by Pin15-16. The address
is 01011[pin15][pin16]X. Hence, the content of CR [48h] would be 00101110 if pin15=1 and pin16=0.
The read/write of the CPUT1/CPUT2 temperature sensor registers can be implemented through the
second address (defined at CR [4Ah] bit2-0 10011[IA1][IA0]X) and the third address (defined at
CR[4Ah] bit6-4 10010[IA1][IA0]X).rst address defined at CR[48h], all the registers can be read and
written.
7.3
(a) Serial bus writes to internal address register followed by the data byte
General Description
Access Interface
The first serial bus access timing
SCL
SDA
Start By
Master
0
0
Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte
1
TM
Serial Bus Address Byte
4 thermal diode outputs, and case open detection also supported in
0
SCL
SDA (Continued)
Frame 1
1
(Continued)
1
TM
I and Smart FAN
0
1
R/W
0
D7
7
- 12 -
792D
Ack
8
D6
by
0
D7
D5
TM
D6
D4
II. 3 sets of thermal inputs for remote
Internal Index Register Byte
D5
D3
Data Byte
Frame 3
W83792AD/AG/D/G
Frame 2
D4
D2
D3
D1
D2
7
D0
784R
792D
Ack
Ack
D1
8
by
by
7
D0
Master
Stop
by
792D
8
Ack
by