DS1780E+ Maxim Integrated Products, DS1780E+ Datasheet - Page 17

• Manufacturer Part Number: DS1780E+
• Description: IC CPU PERIPHERAL MON 24-TSSOP
• Manufacturer: Maxim Integrated Products

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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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