C167CS datasheet(351/517 Pages) INFINEON

351 / 517 page

C167CS

Derivatives

The Pulse Width Modulation Module

User’s Manual

17-10

V2.0, 2000-07

17.2

PWM Module Registers

The PWM module is controlled via two sets of registers. The waveforms are selected by

the channel specific registers PTx (timer), PPx (period) and PWx (pulse width). Three

common registers control the operating modes and the general functions (PWMCON0

and PWMCON1) of the PWM module as well as the interrupt behavior (PWMIC).

Up/Down Counters PTx

Each counter PTx of a PWM channel is clocked either directly with

fCPU or with fCPU/64.

Bit PTIx in register PWMCON0 selects the respective clock source. A PWM counter

counts up or down (controlled by hardware), while its respective run control bit PTRx is

set. A timer is started (PTRx = ‘1’) via software and is stopped (PTRx = ‘0’) either via

hardware or software, depending on its operating mode. Control bit PTRx enables or

disables the clock input of counter PTx rather than controlling the PWM output signal.

Note: For the register locations please refer to Table 17-2 further below.

Table 17-1 summarizes the PWM frequencies that result from various combinations of

operating mode, counter resolution (input clock) and pulse width resolution.

Table 17-1

PWM Output Frequency and Resolution

Inp.Clk. (

fCPU/x)

(Counter resol.)

PWM

Mode

8-bit PWM

Resolution

10-bit PWM

Resolution

12-bit PWM

Resolution

14-bit PWM

Resolution

16-bit PWM

Resolution

16 MHz/1

(62.5 ns)

62.50 kHz

31.25 kHz

15.63 kHz

7.81 kHz

3.91 kHz

1.95 kHz

976.6

488.3

244.1

122.1

16 MHz/64

(4.0

µs)

976.6

488.3

244.1

122.1

61.04

30.52

15.29

7.63

3.81

1.91

20 MHz/1

(50 ns)

78.13 kHz

39.06 kHz

19.53 kHz

9.77 kHz

4.88 kHz

2.44 kHz

1.22 kHz

610.4

305.2

152.6

20 MHz/64

(3.2

µs)

1.22 kHz

610.4

305.2

152.6

76.29

38.15

19.07

9.54

4.77

2.38

25 MHz/1

(40 ns)

97.66 kHz

48.83 kHz

24.41 kHz

12.21 kHz

6.10 kHz

3.05 kHz

1.53 kHz

762.9

381.5

190.7

25 MHz/64

(2.56

µs)

1.53 kHz

762.9

381.5

190.7

95.37

47.68

23.84

11.92

5.96

2.98

33 MHz/1

(30.3 ns)

128.9 kHz

64.45 kHz

32.23 kHz

16.11 kHz

8.06 kHz

4.03 kHz

2.01 kHz

1.01 kHz

503.5

251.8

33 MHz/64

(1.94

µs)

2.01 kHz

1.01 kHz

503.5

251.8

125.9

62.94

31.47

15.74

7.87

3.93

C167CS Datasheet(PDF) 351 Page - Infineon Technologies AG

C167CS Datasheet(HTML) 351 Page - Infineon Technologies AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL