33970 Datasheet, PDF (23/36 Pages) Freescale Semiconductor, Inc – Dual Gauge Driver Integrated Circuit with Improved Damping Algorithms

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
I_MAX
+
I_COIL
0
I_MAX
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
I_MAX
+
I_COIL
0
I_MAX
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Figure 9. Clockwise Microsteps
Table 20. Coil Step Value
Step
Angle
SINE Angle*
SINE Current
Flow
8-Bit Value
(DEC)
8-Bit Value
(HEX)
COS Angle*
COS Current
Flow
8-Bit Value
(DEC)
8-Bit Value
(HEX)
0
0
0
+
1
15
0.259
+
2
30
0.5
+
3
45
0.707
+
4
60
0.866
+
5
75
0.966
+
6
90
1
+
7
105
0.966
+
8
120
0.866
+
9
135
0.707
+
10
150
0.5
+
11
165
0.259
+
12
180
0
+
13
195
-0.259
-
14
210
-0.5
-
15
225
-0.707
-
16
240
-0.866
-
17
255
-0.966
-
18
270
-1
-
19
285
-0.966
-
20
300
-0.866
-
21
315
-0.707
-
22
330
-0.5
-
23
345
-0.259
-
0
0
1
+
66
42
0.965
+
128
80
0.866
+
181
B5
0.707
+
222
DE
0.5
+
247
F7
0.259
+
255
FF
0
+
247
F7
-0.259
-
222
DE
-0.5
-
181
B5
-0.707
-
128
80
-0.866
-
66
42
-0.966
-
0
0
-1
-
66
42
-0.966
-
128
80
-0.867
-
181
B5
-0.707
-
222
DE
-0.5
-
247
F7
-0.259
-
255
FF
0
+
247
F7
0.259
+
222
DE
0.5
+
181
B5
0.707
+
128
80
0.866
+
66
42
0.966
+
255
FF
247
F7
222
DE
181
B5
128
80
66
42
0
0
66
42
128
80
181
B5
222
DE
247
F7
255
FF
247
F7
222
DE
181
B5
128
80
66
42
0
0
66
42
128
80
181
B5
222
DE
247
F7
Analog Integrated Circuit Device Data
Freescale Semiconductor
33970
23