ADT7470ARQZ-REEL Analog Devices Inc, ADT7470ARQZ-REEL Datasheet - Page 31

• Manufacturer Part Number: ADT7470ARQZ-REEL
• Description: IC,Motor Controller,SSOP,16PIN
• Manufacturer: Analog Devices Inc

Specifications of ADT7470ARQZ-REEL

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Control, Register Bank
• Sensor Type: External
• Sensing Temperature: External Sensor
• Output Type: I²C™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-ADT7470EBZ - BOARD EVALUATION FOR ADT7470
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 32. Register 0x41. Interrupt Status Register 1 (Power-On Default = 0x00).
Bit Name
[0] R1T
[1] R2T
[2] R3T
[3] R4T
[4] R5T
[5] R6T
[6] R7T
[7] OOL
Table 33. Register 0x42. Interrupt Status Register 2 (Power-On Default = 0x00).
Bit Name
[0] R8T
[1] R9T
[2] R10T
[3] NORM
[4] Fan 1
[5] Fan 2
[6] Fan 3
[7] Fan 4
Read/Write
Read-only
Read-only
Read-only
Read-only
Read-only
Read-only
Read-only
Read-only
Read/Write
Read-only
Read-only
Read-only
Read-only
Read-only
Read-only
Read-only
Read-only
Description
A 1 indicates that the Remote 1 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that the Remote 2 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that the Remote 3 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that the Remote 4 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that the Remote 5 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that the Remote 6 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that the Remote 7 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that an out-of-limit event has been latched in Status Register 2. This bit is a
logical OR of all status bits in Status Register 2. Software can test this bit in isolation to
determine whether any of the temperature or fan speed readings represented by Status
Register 2 are out of limit. This saves the need to read Status Register 2 every interrupt or
polling cycle.
Description
A 1 indicates that the Remote 8 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that the Remote 9 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that the Remote 10 temperature high or low limit has been exceeded.
This bit is cleared on a read of the status register only if the error condition has subsided.
A 1 indicates that the measured temperatures are normal (below T
be off.
A 1 indicates that Fan 1 has gone above max speed or dropped below min speed.
A 1 indicates that Fan 2 has gone above max speed or dropped below min speed.
A 1 indicates that Fan 3 has gone above max speed or dropped below min speed.
A 1 indicates that Fan 4 has gone above max speed or dropped below min speed.
Rev. C | Page 31 of 40
MIN
), and the fans should
ADT7470