Rainbow Electronics MAX6616 - Manual (Page 13)

MAX6615/MAX6616
Dual-Channel Temperature Monitors and
Fan-Speed Controllers with Thermistor Inputs
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Table 3. Register Map (continued)
R/ W ADD
POR
STATE
FUNCTION D7 D6 D5 D4 D3 D2 D1 D0
R 0Dh
0000
000x
PWM1
instantan-
eous duty
cycle
MSB
(128/240)
— — — — —
LSB
(2/240)
—
R 0Eh
0000
000x
PWM2
instantan-
eous duty
cycle
MSB
(128/240)
— — — — —
LSB
(2/240)
—
R/ W 0Fh
0000
0000
Channel 1
fan-start
temperature
MSB — — — — — — LSB
R/ W 10h
0000
0000
Channel 2
fan-start
temperature
MSB — — — — — — LSB
R/ W 11h
0000
000x Fan
configuration
Hysteresis:
0 = 5°C, 1
= 10°C
Temp
step : 0 =
1°C,
1 2°C
Fan 1:
control 1
= Ch 1
Fan 1:
control 1
= Ch 2
Fan 2:
control 1
= Ch 1
Fan 2:
control 1
= Ch 2
— —
R/ W 12h
1011
01xx
Duty-cycle
rate of
change
Fan 1 MSB —
Fan 1
LSB
Fan 2
MSB
—
Fan 2
LSB
— —
R/ W 13h
0101
0101 Duty-cycle
step size
Fan 1 MSB — —
Fan 1
LSB
Fan 2
MSB
— —
Fan 2
LSB
R/ W 14h
010x
xxxx
PWM
frequency
select
Select A Select B Select C — — — — —
R/ W 15h
xx00
000*
GPIO
function
— —
GPIO5:
0 =
output; 1
= input
GPIO4:
0 =
output; 1
= input
GPIO3:
0 =
output; 1
= input
GPIO2:
0 =
output; 1
= input
GPIO1:
0 =
output; 1
= input
GPIO0:
0 =
output; 1
= input
R/ W 16h
xx11
111*
( N ote 1)
GPIO value — — GPIO5 GPIO4 GPIO3 GPIO2 GPIO1 GPIO0
R/ W 17h
0000
0000
Thermistor
offset
register
Th1 MSB
(sign)
— —
Th1 LSB
(2°C)
Th2 MSB
(sign)
— —
Th2 LSB
(2°C)
R 18h
1111
1111 Tach1 value
register
— — — — — — — —
R 19h
1111
1111 Tach2 value
register
— — — — — — — —
R/ W 1Ah
1111
1111 Tach1 limit
register
— — — — — — — —
R/ W 1Bh
1111
1111 Tach2 limit
register
— — — — — — — —