ADM1026
Reduced Power Mode
The ADM1026 can be placed in a low power mode by
setting Bit 0 of the configuration register to 0. This disables
the internal ADC.
Software Reset Function
As previously mentioned, the ADM1026 can be reset in
software by setting Bit 7 of Configuration Register 1
(Reg. 00h) to 1. Configuration Register 1, 00h, should then
be manually cleared. Note that the software reset differs
from a power-on reset in that only some of the ADM1026
registers are reinitialized to their power-on default values.
The registers that are initialized to their default values by the
software reset are
? Configuration Registers (Registers 01h to 0Bh)
? Mask Registers 1 to 6, internal temperature offset, and
Status Registers 4, 5, and 6 (Registers 18h to 25h)
Note that the limit registers (0Dh to 12h, 40h to 6Dh) are
not reset by the software reset function. This can be useful
if one needs to reset the part but does not want to reprogram
all parameters again. Note that a power-on reset initializes
all registers on the ADM1026, including the limit registers.
Application Schematic
Figure 61 shows how the ADM1026 could be used in an
application that requires system management of a PC or
server. Several GPIOs are used to read the VID codes of the
CPU. Up to two CPU temperature measurements can be read
back. All power supply voltages are monitored in the
system. Up to eight fan speeds can be measured, irrespective
of whether they are controlled by the ADM1026 or
hardwired to a system supply. The V REF output includes the
recommended filtering circuitry.
? All value registers (Registers 1Fh, 20h to 3Fh)
? External 1 and External 2 Offset Registers (6Eh, 6Fh)
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