Datasheet

11 - PWM MODULE ST10F269
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11 - 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
single shot outputs. Table 16 and Table 17 show
the PWM frequencies for different resolutions. The
level of the output signals is selectable and the
PWM module can generate interrupt requests.
Table 16 : PWM Unit Frequencies and Resolution at 40MHz CPU Clock (PQFP144 devices)
Table 17 : PWM Unit Frequencies and Resolution at 32MHz CPU Clock (TQFP144 devices)
Figure 17 : Block Diagram of PWM Module
Mode 0 Resolution 8-bit 10-bit 12-bit 14-bit 16-bit
CPU Clock/1 25ns 156.25kHz 39.1kHz 9.77kHz 2.44Hz 610Hz
CPU Clock/64 1.6µs 2.44Hz 610Hz 152.6Hz 38.15Hz 9.54Hz
Mode 1 Resolution 8-bit 10-bit 12-bit 14-bit 16-bit
CPU Clock/1 25ns 78.12kHz 19.53kHz 4.88kHz 1.22kHz 305.17Hz
CPU Clock/64 1.6µs 1.22kHz 305.17Hz 76.29Hz 19.07Hz 4.77Hz
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
Mode 0 Resolution 8-bit 10-bit 12-bit 14-bit 16-bit
CPU Clock/1 31.25ns 125KHz 31.25KHz 7.81KHz 1.953KHz 976.6Hz
CPU Clock/64 2.00µs 1.953KHz 488.3Hz 122.1Hz 30.52Hz 7.63Hz
Mode 1 Resolution 8-bit 10-bit 12-bit 14-bit 16-bit
CPU Clock/1 31.25ns 62.5KHz 15.62KHz 3.90KHz 976.6Hz 244.1Hz
CPU Clock/64 2.00µs 976.6Hz 244.1Hz 61Hz 15.26Hz 3.81Hz