DRV10983-Q1 Datasheet, PDF (53/72 Pages) Texas Instruments – Automotive, Three-Phase, Sensorless BLDC Motor Driver

www.ti.com
8.5.3.22 CONFIG1 Register (address = 0x90) [reset = 0x00]
DRV10983-Q1
SLVSD14 – JUNE 2017
15
SSMConfig[1]
R/W-0
7
ClkCycleAdjust
R/W-0
14
SSMConfig[0]
R/W-0
6
RMShift[2]
R/W-0
Bit
15:14
Field
SSMConfig[1:0]
13:12 FGOLSel[1:0]
11:8 FGCycle[3:0]
7
ClkCycleAdjust
6:4 RMShift[2:0]
3:0 RMValue[3:0]
Figure 61. CONFIG1 Register
13
FGOLSel[1]
R/W-0
12
FGOLSel[0]
R/W-0
11
FGCycle[3]
R/W-0
10
FGCycle[2]
R/W-0
9
FGCycle[1]
R/W-0
8
FGCycle[0]
R/W-0
5
RMShift[1]
R/W-0
4
RMShift[0]
R/W-0
3
RMValue[3]
R/W-0
2
RMValue[2]
R/W-0
1
RMValue[1]
R/W-0
0
RMValue[0]
R/W-0
Table 29. CONFIG1 Register Field Descriptions
Type
R/W
Reset
00
R/W
00
R/W
0x0
R/W
0
R/W
000
R/W
0x0
Description
Spread spectrum modulation control
00: No spread spectrum
01: ±5% dithering
1:0: ±10% dithering
11: ±15% dithering
FG open-loop output select
00: FG outputs in both open loop and closed loop
01: FG outputs only in closed loop
10: FG outputs closed loop and the first open loop
11: Reserved
FG motor pole option
n: FG output is electrical speed / (n + 1)
0: FG / 1 (2 pole)
1: FG / 2 (4 pole)
2: FG / 3 (6 pole)
3: FG / 4 (8 pole)
...
15: FG / 16 (32 pole)
0: Full-cycle adjust
1: Half-cycle adjust
Number of shift bits to determine the motor phase resistance.
RM = RmValue << RmShift
Rm' = (bin) {RPhase / 0.009615}
After calculating Rm' value, split the value with shift number and
significant number according the length of the Rm' value.
If the length of Rm' is within 4 bits; RmValue[3:0] = Rm';
RmShift[2:0] = 000
If the length of Rm' is 5 bits; RmValue[3:0] = Rm'[4:1];
RmShift[2:0] = 001
and so on.
Significant portion of the motor resistor, used in conjunction with
RmShift[2:0]
8.5.3.23 CONFIG2 Register (address = 0x91) [reset = 0x00]
Figure 62. CONFIG2 Register
15
Reserved
R-0
14
KtShift[2]
R/W-0
13
KtShift[1]
R/W-0
12
KtShift[0]
R/W-0
7
CommAdvMod
e
R/W-0
6
5
4
TCtrlAdvShift[2] TCtrlAdvShift[1] TCtrlAdvShift[0]
R/W-0
R/W-0
R/W-0
11
KtValue[3]
R/W-0
3
R-0
10
KtValue[2]
R/W-0
2
R-0
9
KtValue[1]
R/W-0
1
R-0
8
KtValue[0]
R/W-0
0
R-0
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: DRV10983-Q1
Submit Documentation Feedback
53