ST7LITEUS2 datasheet(76/136 Pages) STMICROELECTRONICS

76 / 136 page

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On-chip peripherals

ST7LITEUS2, ST7LITEUS5

76/136

Auto reload register (ATRL)

This is a 12-bit register which is written by software. The ATR register value is automatically

loaded into the upcounter when an overflow occurs. The register value is used to set the

PWM frequency.

Reset value: 0000 0000 (00h)

PWM0 duty cycle register high (DCR0H)

Reset value: 0000 0000 (00h)

PWM0 duty cycle register low (DCR0L)

This 12-bit value is written by software. The high register must be written first.

In PWM mode (OE0=1 in the PWMCR register) the DCR[11:0] bits define the duty cycle of

the PWM0 output signal (see Figure 34). In Output Compare mode, (OE0=0 in the PWMCR

Reset value: 0000 0000 (00h)

ATR7

ATR6

ATR5

ATR4

ATR3

ATR2

ATR1

ATR0

Read/Write

Bits 15:12 Reserved, must be kept cleared.

Bits 11:0 ATR[11:0] Auto-reload Register.

DCR11

DCR10

DCR9

DCR8

Read/Write

DCR7

DCR6

DCR5

DCR4

DCR3

DCR2

DCR1

DCR0

Read/Write

Bits 15:12 Reserved, must be kept cleared.

Bits 11:0 DCR[11:0] PWMx duty cycle value

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