Freescale Semiconductor DRM079 manual Temperature Conversion Table

			Temperature Sensor Measurement
	Table 3-3. Temperature Conversion Table
	Channel Resistance	Voltage	Predefined	Target PWM Period
Temperature		across
	(kΩ)		Motor Speed
(°C)		Sensor		(Timer Counts(1))
	(from sensor data sheet)		(rpm)
		(V)
25 or below	10	2.86	1000	232
30 – 34	8.082	2.59	1200	193
35 – 39	6.577	2.34	1400	165
40 – 44	5.387	2.09	1600	144
45 – 49	4.441	1.86	1800	128
50 – 54	3.683	1.65	2000	115
55 – 59	3.024	1.44	2200	105
60 – 64	2.53	1.26	2400	96
65 – 69	2.128	1.11	2600	88
70 – 74	1.799	0.97	2800	82
75 – 79	1.528	0.85	3000	76
80 – 84	1.304	0.74	3200	71
85 – 89	1.118	0.65	3400	67
90 – 94	0.962	0.57	3600	63
95 – 99	0.831	0.50	3800	60
100 or above	0.698	0.43	4000	57

NOTES:

1. The resolution of a timer count is 64∝s.

Variable Speed DC Fan Control using the MC9RS08KA2, Rev. 0

Freescale Semiconductor 21