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ST72321R7-Auto датащи(PDF) 95 Page - STMicroelectronics

номер детали ST72321R7-Auto
подробное описание детали  PLL for 2x frequency multiplication
PDF  243 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
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ST72321R7-Auto датащи(HTML) 95 Page - STMicroelectronics

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ST72321xx-Auto
PWM auto-reload timer (ART)
Doc ID 13829 Rev 1
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12.3.4
PWM control register (PWMCR)
Table 49.
PWM frequency versus resolution
ARTARR value
Resolution
fPWM
Min
Max
0
8-bit
~0.244 kHz
31.25 kHz
[ 0..127 ]
> 7-bit
~0.244 kHz
62.5 kHz
[ 128..191 ]
> 6-bit
~0.488 kHz
125 kHz
[ 192..223 ]
> 5-bit
~0.977 kHz
250 kHz
[ 224..239 ]
> 4-bit
~1.953 kHz
500 kHz
PWMCR
Reset value: 0000 0000 (00h)
76
543
21
0
OE[3:0]
OP[3:0]
RW
RW
Table 50.
PWMCR register description
Bit
Name
Function
7:4
OE[3:0]
PWM Output Enable
These bits are set and cleared by software. They enable or disable the PWM
output channels independently acting on the corresponding I/O pin.
0: PWM output disabled
1: PWM output enabled
3:0
OP[3:0]
PWM Output Polarity
These bits are set and cleared by software. They independently select the polarity
of the four PWM output signals (see Table 51).
Table 51.
PWM output signal polarity selection
PWMx output level
OPx(1)
1.
When an OPx bit is modified, the PWMx output signal polarity is immediately reversed.
Counter <= OCRx
Counter > OCRx
100
011



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