ST72521 datasheet(67/211 Pages) STMICROELECTRONICS

部件名	ST72521

功能描述	8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE

PDF	211 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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67 / 211 page

ST72521

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PWM AUTO-RELOAD TIMER (Cont’d)

PWM CONTROL REGISTER (PWMCR)

Read /Write

Reset Value: 0000 0000 (00h)

Bit 7:4 = OE[3:0]

PWM Output Enable

These bits are set and cleared by software. They

enable or disable the PWM output channels inde-

pendently acting on the corresponding I/O pin.

0: PWM output disabled.

1: PWM output enabled.

Bit 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.

Note: When an OPx bit is modified, the PWMx out-

put signal polarity is immediately reversed.

DUTY CYCLE REGISTERS (PWMDCRx)

Read /Write

Reset Value: 0000 0000 (00h)

Bit 7:0 = DC[7:0]

Duty Cycle Data

These bits are set and cleared by software.

A PWMDCRx register is associated with the OCRx

second edge location of the PWM signal (the first

edge location is common to all channels and given

by the ARTARR register). These PWMDCR regis-

ters allow the duty cycle to be set independently

for each PWM channel.

OE3OE2

OE1OE0

OP3OP2

OP1OP0

PWMx output level

OPx

Counter <= OCRx

Counter > OCRx

DC7

DC6

DC5

DC4

DC3

DC2

DC1

DC0

ST72521 数据表(PDF) 67 Page - STMicroelectronics

ST72521 数据表(HTML) 67 Page - STMicroelectronics

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