Typical PWM Mask Settings (Currents Balanced)
Mask | Mask | REVTM | FORTM |
|
| ||||
(hex) | (dec) |
|
|
|
0x00 | 0 | 600 ns | 600 ns |
|
0x11 | 17 | 700 ns | 700 ns |
|
0x22 | 34 | 800 ns | 800 ns |
|
0x33 | 51 | 900 ns | 900 ns |
|
0x44 | 68 | 1.0 µs | 1.0 µs |
|
0x55 | 85 | 1.1 µs | 1.1 µs |
|
0x66 | 102 | 1.2 µs | 1.2 µs |
|
0x77 | 119 | 1.4 µs | 1.4 µs |
|
Mask | Mask | REVTM | FORTM |
(hex) | (dec) | ||
0x88 | 135 | 1.6 µs | 1.6 µs |
0x99 | 153 | 1.8 µs | 1.8 µs |
0xAA | 170 | 2.0 µs | 2.0 µs |
0xBB | 187 | 2.2 µs | 2.2 µs |
0xCC | 204 | 2.5 µs | 2.5 µs |
0xDD | 221 | 2.8 µs | 2.8 µs |
0xEE | 238 | 3.1 µs | 3.1 µs |
0xFF | 255 | 3.4 µs | 3.4 µs |
Table 2.6.7: Typical PWM Mask Settings
Maximum PWM Duty Cycle (%) Parameter
This parameter sets the maximum duty cycle as a percentage of the bridge PWM oscillator period. The range for this parameter is 0 to 95%. The default value for this parameter is 95%.
PWM Frequency Range Parameter
The PWM Frequency Parameter sets the initial and maximum frequencies for the PWM. As with the MASK parameter, the PWM Frequency is a two part
The default for this 170 (0xAA) with an initial PWM Frequency of 20 kHz and a Maximum of 60 kHz.
Maximum PWM Frequency (kHz)
Hex Freq.
0x0 40
0x1 42
0x2 44
0x3 46
Hex Freq
0x4 48
0x5 50
0x6 52
0x7 54
Hex Freq
0x8 56
0x9 58 0xA 60
0xB 62
Hex Freq 0xC 64 0xD 66
0xE 68
0xF 70
Initial PWM Frequency (kHz)
Hex Freq.
0x0 10
0x1 11
0x2 12
0x3 13
Hex Freq
0x4 14
0x5 15
0x6 16
0x7 17
Hex Freq
0x8 18
0x9 19 0xA 20
0xB 21
Hex | Freq |
0xC | 22 |
0xD | 23 |
0xE | 24 |
0xF | 25 |
Table 2.6.8: Maximum and Initial PWM Frequency
PWM Max. Frequency | PWM Initial Frequency |
0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 |
| 0x5 (50 kHz) |
|
| 0xE (24 kHz) |
|
Convert to Decimal
0x5E
PWM SFREQ = 94 PWM Frequency Range 24 to 50 kHz
Figure 2.6.15: PWM Frequency Range
Part 2: Interfacing and Configuring | 39 |