ADM1026JSTZ-R7 datasheet(32/55 Pages) ONSEMI

32 / 55 page

ADM1026

http://onsemi.com

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)

 All value registers (Registers 1Fh, 20h to 3Fh)

 External 1 and External 2 Offset Registers (6Eh, 6Fh)

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 VREF output includes the

recommended filtering circuitry.

ADM1026JSTZ-R7 Datenblatt(PDF) 32 Page - ON Semiconductor