EVAL-ADT7467EBZ ON Semiconductor, EVAL-ADT7467EBZ Datasheet - Page 74

• Manufacturer Part Number: EVAL-ADT7467EBZ
• Description: BOARD EVALUATION FOR ADT7467
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of EVAL-ADT7467EBZ

• Sensor Type: Temperature
• Sensing Range: -40°C ~ 120°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1.5°C
• Voltage - Supply: 3 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: ADT7467
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADT7467
Table 56. Register 0x79— THERM Timer Status Register (Power-On Default = 0x00)
Bit
<7:1>
<0>
Table 57. Register 0x7A— THERM Timer Limit Register (Power-On Default = 0x00)
Bit
<7:0>
Table 58. Register 0x7B—TACH Pulses per Revolution Register (Power-On Default = 0x55)
Bit
<1:0>
<3:2>
<5:4>
<7:6>
Table 59. Register 0x7C—Configuration Register 5 (Power-On Default = 0x00)
Bit
<0>
<1>
<2>
<3>
<4:7>
1
This register becomes a read-only register when the Configuration Register 1 LOCK bit is set to 1. Any subsequent attempts to write to this register fail.
Name
LIMT
Name
FAN1
FAN2
FAN3
FAN4
Name
TMR
ASRT/TMR0
Name
Twos Compl
LF/HF
GPIOD
GPIOP
RES
R/W
Read/write
R/W
Read/write
Read/write
Read/write
Read/write
R/W
Read/write
Read/write
Read/write
Read/write
Read/write
R/W
Read only
Read only
1
Description
Times how long THERM input is asserted. These seven bits read 0 until the THERM assertion time exceeds 45.52 ms.
This bit is set high upon the assertion of the THERM input and is cleared upon a read. If the THERM assertion time
exceeds 45.52 ms, this bit is set and becomes the LSB of the 8-bit TMR reading. This allows THERM assertion times
from 45.52 ms to 5.82 sec to be reported back with a resolution of 22.76 ms.
Description
Twos Compl = 1 sets the temperature range to twos complement temperature range.
Twos Compl = 0 changes the temperature range to Offset 64. When this bit is changed, the ADT7467 interprets all
relevant temperature register values as defined by this bit.
Sets the PWM drive frequency to high frequency mode (0) or low frequency mode (1).
GPIO direction. When GPIO function is enabled, this determines whether the GPIO is an input (0) or an output (1).
GPIO polarity. When the GPIO function is enabled and programmed as an output, this bit determines whether the
GPIO is active low (0) or high (1).
Unused.
Description
Sets the maximum THERM assertion length before an interrupt is generated. This is an 8-bit limit with a
resolution of 22.76 ms, allowing THERM assertion limits of 45.52 ms to 5.82 sec to be programmed. If the THERM
assertion time exceeds this limit, Bit 5 (F4P) of Interrupt Status Register 2 (0x42) is set. If the limit value is 0x00, an
interrupt is generated immediately upon the assertion of the THERM input.
Description
Sets the number of pulses to be counted when measuring Fan 1 speed. Can be used to determine fan pulses per
revolution for an unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets the number of pulses to be counted when measuring Fan 2 speed. Can be used to determine fan pulses per
revolution for an unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets the number of pulses to be counted when measuring Fan 3 speed. Can be used to determine fan pulses per
revolution for an unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets the number of pulses to be counted when measuring Fan 4 speed. Can be used to determine fan pulses per
revolution for an unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
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