W83772G
7.   FUNCTIONAL DESCRIPTION
7.1   General Description
The W83772G provides one remote temperature sensor input which could be connected to 2N3904
transistors, or CPU/GPU thermal diode, and one local on-die thermal sensor to detect ambient
temperature.
The data format of monitored temperature is 16-bit 2s complement with 1-wire SST
 
access interface.
7.2   Access Interface
The W83772G provides SST interface to read/write internal registers, and the SST address is
xxxxxxxxb, respectively. Please refer to 7.7 Address Selection.
7.3   Power-On Reset
The power-on reset threshold is 2.7V (typical). When Vcc crosses this threshold, the internal reset
signal will be asserted for 4mS. During this time period, W83772G is in the reset state. When the
internal reset signal is de-asserted, W83772G is in the operating state.
In the operating state, if Vcc drops below 2.4V and then rises above 2.7, the internal reset signal will
be asserted immediately. Fig 1 illustrates the reset mechanism. 
.
 
Figure 1. 
0
2.4V
2.7V
3.3V
VCC
Internal Reset Signal
4ms
4ms
2.7V
3.3V
- 4 -
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