ADM1026JST ON Semiconductor, ADM1026JST Datasheet - Page 32

• Manufacturer Part Number: ADM1026JST
• Description: IC CNTRL SYS REF/EEPROM 48LQFP
• Manufacturer: ON Semiconductor

Specifications of ADM1026JST

• Rohs Status: RoHS non-compliant
• Function: Hardware Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: 0°C ~ 100°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 48-LFQFP

Reduced Power Mode
setting Bit 0 of the configuration register to 0. This disables
the internal ADC.
Software Reset Function
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
•
•
•
•
The ADM1026 can be placed in a low power mode by
As previously mentioned, the ADM1026 can be reset in
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)
http://onsemi.com
32
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
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
recommended filtering circuitry.
Note that the limit registers (0Dh to 12h, 40h to 6Dh) are
Figure 61 shows how the ADM1026 could be used in an
REF
output includes the