DS1780E Maxim Integrated Products, DS1780E Datasheet - Page 17
DS1780E
Manufacturer Part Number
DS1780E
Description
IC CPU PERIPHERAL MON 24-TSSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1780E.pdf
(28 pages)
Specifications of DS1780E
Function
Thermal Monitor, CPU Peripherals
Topology
ADC (Sigma Delta), Comparator, Fan Speed Control, Register Bank
Sensor Type
Internal
Sensing Temperature
-40°C ~ 125°C
Output Type
I²C™/SMBus™
Output Alarm
No
Output Fan
Yes
Voltage - Supply
2.8 V ~ 5.75 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
24-TSSOP
Full Temp Accuracy
+/- 12 %
Digital Output - Bus Interface
Serial (2-Wire)
Digital Output - Number Of Bits
8 bit
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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17
CONFIGURATION REGISTER (ADDRESS 0X40; POWER-UP DEFAULT = 08h)
Table 10.2
INTERRUPT INT STATUS REGISTER 1 (ADDRESS 0X41; POWER-UP
DEFAULT = 00h) Table 10.3
BIT
BIT
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
V
Initialization
+2.5V_Error
+3.3V_Error
FAN1_Error
FAN2_Error
Temp_Error
INT Enable
CHS Reset
+5V_Error
INT Clear
Reserved
Reserved
CCP1
Reserved
START
NAME
RESET
NAME
_Errror
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
A 1 indicates that a fan count limit has been exceeded.
A 1 indicates that a fan count limit has been exceeded.
Logic 1 enables startup of measurement loop, logic 0 places the DS1780 in standby mode.
Caution: The
interrupt has occurred (see “
scanning begins. Note, all HIGH and LOW LIMITS should be set into the DS1780 prior to
turning on this bit. (Power-up default=0).
Logic 1 enables the
Power-up Default = 0.
During Interrupt Service Routine (ISR) this bit asserted logic 1 clears
affecting the contents of the Interrupt Status Registers. The device will stop monitoring. It
will resume upon clearing of this bit. (Power-up default=1.)
Creates a RESET (Active Low) signal for 20 ms (min) on the
default = 0) This bit is cleared once the
Power-up Default = 0.
Logic 1 resets the chassis intrusion pin. (Power-up default = 0) This bit is cleared after CHS
becomes cleared.
Logic 1 restores power-up default values to all DS1780 registers except for the analog
output and value RAM, which remain unchanged. This bit automatically clears itself since
the power on default is 0.
A 1 indicates a High or Low limit has been exceeded.
A 1 indicates a High or Low limit has been exceeded.
A 1 indicates a High or Low limit has been exceeded.
A 1 indicates a High or Low limit has been exceeded.
A 1 indicates that a high or low temperature limit has been exceeded. The conditions that
will generate and clear this bit depend upon the temperature interrupt mode chosen. The
mode is set at bits 0 and 1 of the Temperature Configuration Register (0x48h).
0
INT
output pin will not be cleared if the user writes a 0 to this location after an
INT
17 of 28
output. 1=Enabled 0=Disabled (Power-up Default = 0)
INT
Clear” bit). At startup, limit checking functions and
DESCRIPTION
DESCRIPTION
RST
pulse goes active.
RST
INT
output. (Power-up
output without