ST10 datasheet(21/65 Pages) STMICROELECTRONICS

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ST10C167

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X - PWM MODULE

The pulse width modulation module can generate

up to four PWM output signals using edge-aligned

or centre-aligned PWM. In addition, the PWM

module can generate PWM burst signals and sin-

gle shot outputs. Table 8 shows the PWM fre-

quencies for different resolutions. The level of the

output signals is selectable and the PWM module

can generate interrupt requests.

Table 8 : PWM unit frequencies and resolution at 25MHz clock

Mode 0

Resoluti on

8-bit

10-bit

12-bit

14-bit

16-bit

CPU Clock/1

40ns

97.66KHz

24.41KHz

6.104KHz

1.526KHz

0.381KHz

CPU Clock/64

2.56ns

1.526KHz

381.5Hz

95.37Hz

23.84Hz

5.96Hz

Mode 1

Resoluti on

8-bit

10-bit

12-bit

14-bit

16-bit

CPU Clock/1

40ns

48.82KHz

12.20KHz

3.05KHz

762.9Hz

190.7Hz

CPU Clock/64

2.56ns

762.9Hz

190.7 Hz

47.68Hz

11.92Hz

2.98Hz

Figure 7 : Block diagram of PWM module

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 read-& writeable

Enable

POUTx

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