ASC7512
Description
The a SC7512 has a two wire digital interface patible with SMBus 2.0. Using a 10-bit ΣΔ- ADC, the a SC7512 measures the temperature of a remote diode connected transistor as well as its own die. Using temperature information from these two zones, an automatic fan speed control algorithm is employed to minimize acoustic impact while achieving remended CPU temperature under varying operational loads. To set fan speed, the a SC7512 has a pulse width modulation (PWM) output that is controlled by one of two temperature zones. Both high- and low-frequency PWM ranges are supported. The a SC7512 also includes a digital filter that can be invoked to smooth temperature readings for better control of fan speed and minimum acoustic impact. The a SC7512 has a tachometer input to measure fan speed or alternatively, an alert pin that may be triggered by exceeding a temperature limit setting. Limit and status registers for all measured values are included to alert the system host that any...
