MAX6615AEE+ Maxim Integrated Products, MAX6615AEE+ Datasheet - Page 14

• Manufacturer Part Number: MAX6615AEE+
• Description: IC TEMP MONITOR DL-CH 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6615AEE+

• Function: Fan Control, Temp Monitor
• Topology: ADC, PWM Generator, Tach Counter
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• 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

Dual-Channel Temperature Monitors and
Fan-Speed Controllers with Thermistor Inputs
Table 3. Register Map (continued)
* GPIO0 POR values are set by PRESET.
Table 4. Configuration Byte Definition (02h)
14
R/W ADD
R/W
BIT
R
R
R
R
R
7
6
5
4
3
2
1
0
______________________________________________________________________________________
1Ch
1Eh
FDh
FEh
1Fh
FFh
FAN1 PWM INVERT
FAN2 PWM INVERT
SPIN-UP DISABLE
MIN DUTY CYCLE
SOURCE SELECT
TEMPERATURE
RUN/STANDBY
TIMEOUT
STATE
NAME
POR
0000
0000
0000
0000
0000
0000
0000
0001
0110
1000
0100
1101
POR
Read device
Read device
m anufactur er
FUNCTION
temp LSBs
temp LSBs
Fan status
Channel 1
Channel 2
revision
Read
byte
ID
ID
STATE
POR
0
0
0
1
1
0
0
0
1 = fan 1
Set to zero for normal operation. Set to 1 to suspend conversions and PWM outputs.
Set to 1 to perform reset of all device registers.
Set TIMEOUT to zero to enable SMBus timeout for prevention of bus lockup. Set to 1 to
disable this function.
Set fan PWM invert to zero to force PWM1 low when the duty cycle is 100%. Set to 1 to
force PWM1 high when the duty cycle is 100%.
Set fan PWM invert to zero to force PWM2 low when the duty cycle is 100%. Set to 1 to
force PWM2 high when the duty cycle is 100%.
Set min duty cycle to zero for a 0% duty cycle when the measured temperature is below the
fan-temperature threshold in automatic mode. When the temperature equals the fan-
temperature threshold, the duty cycle is the value in the fan-start duty-cycle register, and it
increases with increasing temperature.
Set min duty cycle to 1 to force the PWM duty cycle to the value in the fan-start duty-cycle
register when the measured temperature is below the fan-temperature threshold. As the
temperature increases above the temperature threshold, the duty cycle increases as
programmed.
Selects either local or remote 2 as the source for temperature channel 2 register data.
When D1 = 0, the MAX6615/MAX6616 measure remote 2 and when D1 = 1, the
MAX6615/MAX6616 measure the internal die temperature.
Set spin-up disable to 1 to disable spin-up. Set to zero for normal fan spin-up.
(1/2°C)
(1/2°C)
failure
MSB
MSB
D7
0
0
0
1 = fan 2
failure
D6
—
—
0
1
1
disabled
(1/8°C)
(1/8°C)
fan 1
tach
LSB
LSB
1 =
D5
0
1
0
fan 2 tach
disabled
1 =
D4
—
—
0
0
0
FUNCTION
full speed
when it is
measure
fan 1
1 =
D3
—
—
0
1
1
full speed
when it is
measure
fan 2
1 =
D2
—
—
0
0
1
FAN_FAIL
1 = m ask
D1
p i n
—
—
0
0
0
1 = fan 1
fail sets
100%
fan 2
D0
—
—
1
0
1