RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
5.12.1
Diode Faults
The EMC2103 actively detects an open and short condition on each measurement channel. When a
diode fault is detected, the temperature data MSByte is forced to a value of 80h and the FAULT bit is
set in the Status Register. When the External Diode 2 channel is configured to operate in APD mode,
the circuitry will detect independent open fault conditions, however a short condition will be shared
between the External Diode 2 and External Diode 3 channels.
If a diode fault occurs on the hardware defined shutdown channel, then no temperature comparison is
performed. The SYS_SHDN pin will not be asserted.
5.13
GPIOs
The EMC2103-2 contains two dedicated GPIO pins. The GPIO pins can be individually configured as
an input or an output and as a push-pull or open-drain output. Additionally, each GPIO pin, when
configured as an input, can be individually enabled to trigger an interrupt when they change states.
Revision 0.85 (01-29-08)
34
SMSC EMC2103
DATASHEET
SMSC [ SMSC CORPORATION ]
