ST10F272Z2Q3 datasheet(65/189 Pages) STMICROELECTRONICS

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ST10F272Z2

PWM modules

65/189

PWM modules

Two pulse width modulation modules are available on ST10F272Z2: standard PWM0 and

XBUS PWM1. They can generate up to four PWM output signals each, using edge-aligned

or centre-aligned PWM. In addition, the PWM modules can generate PWM burst signals and

single shot outputs. The Table 39 and Table 40 show the PWM frequencies for different

resolutions. The level of the output signals is selectable and the PWM modules can

generate interrupt requests.

Figure 12.

Block diagram of PWM module

Table 39.

PWM unit frequencies and resolutions at 40 MHz CPU clock

Mode 0

Resolution

8-bit

10-bit

12-bit

14-bit

16-bit

CPU Clock/1

25 ns

156.25 kHz

39.1 kHz

9.77 kHz

2.44Hz

610Hz

CPU

Clock/64

1.6

µs

2.44 kHz

610 Hz

152.6 Hz

38.15 Hz

9.54 Hz

Mode 1

Resolution

8-bit

10-bit

12-bit

14-bit

16-bit

CPU Clock/1

25 ns

78.12 kHz

19.53 kHz

4.88 kHz

1.22 kHz

305.2 Hz

CPU

Clock/64

1.6

µs

1.22 kHz

305.17 Hz

76.29 Hz

19.07 Hz

4.77 Hz

Table 40.

PWM unit frequencies and resolutions at 64 MHz CPU clock

Mode 0

Resolution

8-bit

10-bit

12-bit

14-bit

16-bit

CPU Clock/1

15.6 ns

250 kHz

62.5 kHz

15.63 kHz

3.91 Hz

977 Hz

CPU

Clock/64

1.0

µs

3.91 kHz

976.6 Hz

244.1 Hz

61.01 Hz

15.26 Hz

Mode 1

Resolution

8-bit

10-bit

12-bit

14-bit

16-bit

CPU Clock/1

15.6 ns

125 kHz

31.25 kHz

7.81 kHz

1.95 kHz

488.3 Hz

CPU

Clock/64

1.0

µs

1.95 kHz

488.28 Hz

122.07 Hz

30.52 Hz

7.63 Hz

PPx Period Register

Comparator

PTx

16-bit Up/Down Counter

Shadow Register

PWx Pulse Width Register

Input

Run

Control

Clock 1

Clock 2

Comparator

Up/Down/

Clear Control

Match

Output Control

Match

Write Control

* User readable / writeable register

Enable

POUTx

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