Bosch PPP6 B8 Series Manual de Serviço descarregar pdf (Página 218)

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101

Pulse Width Modulator

Technical Data MC68HC912D60A — Rev. 3.1

218 Pulse Width Modulator Freescale Semiconductor

Read and write anytime.

The value in the period register determines the period of the associated

PWM channel. If written while the channel is enabled, the new value will

not take effect until the existing period terminates, forcing the counter to

reset. The new period is then latched and is used until a new period

value is written. Reading this register returns the most recent value

written. To start a new period immediately, write the new period value

and then write the counter forcing a new period to start with the new

period value.

Period = Channel-Clock-Period × (PWPER + 1) (CENTR = 0)

Period = Channel-Clock-Period × (2 × PWPER) (CENTR = 1)

Read and write anytime.

Bit 7654321Bit 0

PWPER0 Bit 7654321Bit 0$004C

PWPER1 Bit 7654321Bit 0$004D

PWPER2 Bit 7654321Bit 0$004E

PWPER3 Bit 7654321Bit 0$004F

RESET: 1 1 1 1 1 1 1 1

PWPERx — PWM Channel Period Registers

Bit 7654321Bit 0

PWDTY0 Bit 7654321Bit 0$0050

PWDTY1 Bit 7654321Bit 0$0051

PWDTY2 Bit 7654321Bit 0$0052

PWDTY3 Bit 7654321Bit 0$0053

RESET: 1 1 1 1 1 1 1 1

PWDTYx — PWM Channel Duty Registers

1 2 ... 213 214 215 216 217 218 219 220 221 222 223 ... 459 460

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