SPMCK16Z4MPV20 datasheet(283/500 Pages) FREESCALE

283 / 500 page

M68HC16 Z SERIES

GENERAL-PURPOSE TIMER

USER’S MANUAL

11-19

Data written to PWMA and PWMB is not used until the end of a complete cycle. This

prevents spurious short or long pulses when register values are changed. The current

duty cycle value is stored in the appropriate PWM buffer register (PWMBUFA or PW-

MBUFB). The new value is transferred from the PWM register to the buffer register at

the end of the current cycle.

Registers PWMA, PWMB, and PWMC are reset to $00 during reset. These registers

may be written or read at any time. PWMC is implemented as the lower byte of a 16-

bit register. The upper byte is the CFORC register. The buffer registers, PWMBUFA

and PWMBUFB, are read-only at all times and may be accessed as separate bytes or

as one 16-bit register.

Pins PWMA and PWMB can also be used for general-purpose output. The values of

the F1A and F1B bits in PWMC are driven out on the corresponding PWM pins when

normal PWM operation is disabled. When read, the F1A and F1B bits reflect the states

of the PWMA and PWMB pins.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

SPMCK16Z4MPV20 Datasheet(PDF) 283 Page - Freescale Semiconductor, Inc