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參數資料
| 型號： | ADM1024ARU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | Circular Connector; No. of Contacts:8; Series:LJT06R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:17-8 |
| 中文描述： | 9-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO24 |
| 封裝： | MO-153AD, TSSOP-24 |
| 文件頁數： | 19/28頁 |
| 文件大小： | 285K |
| 代理商： | ADM1024ARU |
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ADM1024
–19–
REV. 0
INTERRUPT STATUS MIRROR REGISTERS
Whenever a bit in one of the Interrupt Status Registers is updated,
the same bit is written to duplicate registers at addresses 4Ch
and 42h. These registers allow a second management system to
access the status data without worrying about clearing the data.
The data in these registers is for reading only and has no effect
on the interrupt output.
TEMPERATURE INTERRUPT MODES
The ADM1024 has two distinct methods of producing interrupts
for out-of-limit temperature measurements from the internal or
external sensors. Temperature errors can generate an interrupt
on the
INT
pin along with other interrupts, but there is also
a separate
THERM
pin that generates an interrupt only for
temperature errors.
Operation of the
INT
output for temperature interrupts is
illustrated in Figure 22. Assuming that the temperature starts off
within the programmed limits and that temperature interrupt
sources are not masked,
INT
will go low if the temperature
measured by any of the internal or external sensors exceeds the
programmed high temperature limit for that sensor, or the hard-
ware limits in register 13h, 14h, 17h, or 18h.
100 C
90 C
80 C
70 C
60 C
50 C
40 C
TEMP
HIGH LIMIT
LOW LIMIT
ACPI CONTROL
METHODS
CLEAR EVENT
INT
*
*
*
*
*
*
*
ACPI AND DEFAULT CONTROL METHODS
ADJUST TEMPERATURE LIMIT VALUES
Figure 22. Operation of
INT
for Temperature Interrupts
Once the interrupt has been cleared, it will not be reasserted
even if the temperature remains above the high limit(s). However,
INT
will be reasserted if:
a. the temperature falls below the low limit for the sensor
or
b. the high limit is/are reprogrammed to a new value, and the
temperature then rises above the new high limit on the next
monitoring cycle
or
c. the
THERM
pin is pulled low externally, which sets Bit 5 of
Interrupt Status Register 2
or
d. An interrupt is generated by another source.
Similarly, should the temperature measured by a sensor start off
within limits then fall below the low limit,
INT
will be asserted.
Once cleared, it will not be reasserted unless:
a. the temperature rises above the high limit
or
b. the low limit is/are reprogrammed, and the temperature then
falls below the new low limit
or
c. the
THERM
pin is pulled low externally, which sets Bit 5 of
Interrupt Status Register 2
or
d. an interrupt is generated by another source.
THERM
INPUT/OUTPUT
The Thermal Management Input/Output (
THERM
) is a logic
input/output with an internal, 100 k
pull-up resistor, that
provides a separate output for temperature interrupts only. It is
enabled by setting Bit 2 of Configuration Register 1. The
THERM
output has two operating modes that can be programmed by Bit
3 of Configuration Register 2 (address 4Ah). With this bit set to
the default value of 0, the
THERM
output operates in “Default”
interrupt mode. With this bit set to 1, the
THERM
output oper-
ates in “ACPI” mode.
Thermal interrupts can still be generated at the
INT
output
while
THERM
is enabled, but if these are not required they can
be masked by writing a 1 to bit 0 of Configuration Register 2
(address 4Ah). The
THERM
pin can also function as a logic
input for an external sensor, for example a temperature sensor such
as the ADM22105 used in Figure 23b. If
THERM
is taken low
by an external source, the analog output will be forced to FFh to
switch a controlled fan to maximum speed. This also generates
an
INT
output as previously described.
DEFAULT MODE
In Default mode, the
THERM
output operates like a thermostat
with hysteresis.
THERM
will go low and Bit 5 of Interrupt Status
Register 2 will be set, if the temperature measured by any of the
sensors exceeds the high limit programmed for that sensor.
It will remain asserted until reset by reading Interrupt Status
Register 2, by setting Bit 6 of Configuration Register 1, or when
the temperature falls below the low limit programmed for that
sensor.
ANALOG
OUTPUT
FF
H
CLEARED BY
TEMP FALLING
BELOW LOW
LIMIT
TEMP
HIGH LIMIT
THERM
TEMP
PROGRAMMED
VALUE
EXT
THERM
INPUT
CLEARED BY
READ OR
THERM
CLEAR
TEMP
LOW LIMIT
Figure 23a.
INT
or
THERM
Output in Default Mode
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