EVAL-ADT7467EBZ ON Semiconductor, EVAL-ADT7467EBZ Datasheet - Page 32

• 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
Bit 5 (FSPDIS), the functionality of this bit can be changed (see
the Disabling Fan Start-Up Timeout section).
PWM1 Configuration Register (0x5C)
<2:0> SPIN, start-up timeout for PWM1
PWM2 Configuration Register (0x5D)
<2:0> SPIN, start-up timeout for PWM2
PWM3 Configuration Register (0x5E)
<2:0> SPIN, start-up timeout for PWM3
Disabling Fan Start-Up Timeout
Although a fan startup makes fan spin-ups more quiet than
fixed-time spin-ups, users can use fixed spin-up times. Setting
Bit 5 (FSPDIS) to 1 in Configuration Register 1 (0x40) disables
the spin-up for two TACH pulses, and the fan spins up for the
fixed time selected in Register 0x5C to Register 0x5E.
000 = no start-up timeout
001 = 100 ms
010 = 250 ms default
011 = 400 ms
100 = 667 ms
101 = 1 sec
110 = 2 sec
111 = 4 sec
000 = no start-up timeout
001 = 100 ms
010 = 250 ms default
011 = 400 ms
100 = 667 ms
000 = no start-up timeout
001 = 100 ms
010 = 250 ms default
011 = 400 ms
100 = 667 ms
101 = 1 sec
110 = 2 sec
111 = 4 sec
101 = 1 sec
110 = 2 sec
111 = 4 sec
Rev. 3 | Page 32 of 77 | www.onsemi.com
PWM LOGIC STATE
The PWM outputs can be programmed high for 100% duty
cycle (noninverted) or programmed low for 100% duty cycle
(inverted).
PWM1 Configuration Register (0x5C)
<4> INV
PWM2 Configuration Register (0x5D)
<4> INV
PWM3 Configuration Register (0x5E)
<4> INV
Low Frequency Mode PWM Drive Frequency
The PWM drive frequency can be adjusted for the application.
Register 0x5F to Register 0x61 configure the PWM frequency
for PWM1 to PWM3, respectively. In high frequency mode, the
PWM drive frequency is 22.5 kHz and cannot be changed.
PWM1 Frequency Registers (0x5F to 0x61)
<2:0> FREQ
000 = 11.0 Hz
001 = 14.7 Hz
010 = 22.1 Hz
011 = 29.4 Hz
100 = 35.3 Hz default
101 = 44.1 Hz
110 = 58.8 Hz
111 = 88.2 Hz
0 = logic high for 100% PWM duty cycle
1 = logic low for 100% PWM duty cycle
0 = logic high for 100% PWM duty cycle
1 = logic low for 100% PWM duty cycle
0 = logic high for 100% PWM duty cycle
1 = logic low for 100% PWM duty cycle