adm9240 Analog Devices, Inc., adm9240 Datasheet - Page 21

• Manufacturer Part Number: adm9240
• Description: Low Cost Microprocessor System Hardware Monitor
• Manufacturer: Analog Devices, Inc.

Pentium is a registered trademark of Intel Corp.
REV. 0
Bit
0–6
Bit
0
1–7
Bit
0–1
2–6
7
Name
Hot Temperature
Interrupt Mode
Select Bits
Reserved
Temp
Name
Serial Bus Address
Name
VID4
Reserved
Table XVII. Register 4Bh, Temperature Configuration Register (Power-On Default = 01h)
Table XV. Register 48h, Serial Address Register (Power-On Default = 0010 11(A1)(A0))
Table XVI. Register 49h, VID 4/Device ID Register (Power-On Default 1000000(VID4))
R/W
Read/Write
Read only
Read/Write
R/W
Read
Read/Write
R/W
Read/Write
Description
If Bit 0 and Bit 1 of this register are both zero or one, this selects the default
interrupt mode, which gives the user an interrupt if the temperature goes above
the hot limit. The interrupt will be cleared once the status register is read, but it
will again be generated when the next conversion has completed. It will continue to
do so until the temperature goes below the hysteresis limit.
A 0 on Bit 1 and a 1 on Bit 0 selects the one-time interrupt mode, which gives the
user an interrupt when the temperature goes above the hot limit. The interrupt will
be cleared once the status register is read. Another interrupt will not be generated
until the temperature first goes below the hysteresis limit. No more interrupts will
be generated until the temperature again goes above the hot limit. The correspond-
ing bit will be cleared in the status register every time it is read, but may not set
again when the next conversion is done. Note that this is the power-up default
mode.
A 1 on Bit 1 and a 0 on Bit 0 selects the comparator mode. This gives an INT
when the temperature exceeds the hot limit. This INT remains active until the
temperature goes below the hot limit (no hysteresis), when the INT will become
inactive.
Default = 00000
LSB of Temperature Reading = 0.5 C
VID4 Input from Pentium
Description
Serial Bus Address (Bits 0 and 1 are Set by A0, A1 and Bit 7 is Read Only)
Description
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ADM9240