ADT7460ARQZ-RL7 ONSEMI [ON Semiconductor], ADT7460ARQZ-RL7 Datasheet - Page 36

• Manufacturer Part Number: ADT7460ARQZ-RL7
• Description: dBCOOL Remote Thermal Monitor and Fan Controller
• Manufacturer: ONSEMI [ON Semiconductor]

1. Setting the Configuration Register 1 lock bit has no effect on these registers.
2. High limits: an interrupt is generated when a value exceeds its high limit (> comparison); low limits: an interrupt is generated when a value
1. Exceeding any of these temperature limits by 1°C causes the appropriate status bit to be set in the interrupt status register. Setting the
2. High limits: an interrupt is generated when a value exceeds its high limit (> comparison); low limits: an interrupt is generated when a value
1. Exceeding any of the TACH limit registers by 1 indicates that the fan is running too slowly or has stalled. The appropriate status bit is set
Table 48. Register 0x42 — Interrupt Status Register 2 (Power−On Default = 0x00)
Table 49. Voltage Limit Registers
Table 50. Temperature Limit Registers
Table 51. Fan Tachometer Limit Registers (Power−On Default = 0xFF)
Bit No.
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
Register Address
Register Address
Register Address
is equal to or below its low limit (≤ comparison).
Configuration Register 1 lock bit has no effect on these registers.
is equal to or below its low limit (≤ comparison).
in Interrupt Status Register 2 to indicate the fan failure. Setting the Configuration Register 1 lock bit has no effect on these registers.
0x4E
0x4F
0x5A
0x5B
0x44
0x45
0x48
0x49
0x50
0x51
0x52
0x53
0x54
0x55
0x56
0x57
0x58
0x59
Mnemonic
FAN1
FAN2
FAN3
RES
OVT
F4P
D1
D2
Read−only
Read−only
Read−only
Read−only
Read−only
Read−only
Read−only
Read−only
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
(Note 1)
Reserved for future use.
A 1 indicates that one of the THERM overtemperature limits has been exceeded. This bit is
cleared on a read of the status register when the temperature drops below THERM − T
A 1 indicates that Fan 1 has dropped below minimum speed or has stalled. This bit is NOT set
when the PWM1 output is off.
A 1 indicates that Fan 2 has dropped below minimum speed or has stalled. This bit is NOT set
when the PWM2 output is off.
A 1 indicates that Fan 3 has dropped below minimum speed or has stalled. This bit is NOT set
when the PWM3 output is off.
A 1 indicates that Fan 4 has dropped below minimum speed or has stalled. This bit is NOT set
when the PWM3 output is off.
If Pin 9 is configured as the THERM timer input for THERM monitoring, this bit is set when the
THERM assertion time exceeds the limit programmed in the THERM Limit Register (Reg. 0x7A).
A 1 indicates either an open or short circuit on the Thermal Diode 1 inputs.
A 1 indicates either an open or short circuit on the Thermal Diode 2 inputs.
2.5 V Low Limit
2.5 V High Limit
V
V
Remote 1 temperature low limit.
Remote 1 temperature high limit.
Local temperature low limit.
Local temperature high limit.
Remote 2 temperature low limit.
Remote 2 temperature high limit.
TACH1 minimum low byte.
TACH1 minimum high byte.
TACH2 minimum low byte.
TACH2 minimum high byte.
TACH3 minimum low byte.
TACH3 minimum high byte.
TACH4 minimum low byte.
TACH4 minimum high byte.
CC
CC
Low Limit.
High Limit.
(Note 1)
http://onsemi.com
Description (Note 2)
Description (Note 2)
ADT7460
36
Description
Description
(Note 1)
Power−On Default
Power−On Default
0x00
0xFF
0x00
0xFF
0x81
0x7F
0x81
0x7F
0x81
0x7F
HYST
.