PC312XDP512F0CFVR datasheet(391/1348 Pages) FREESCALE

Part #	PC312XDP512F0CFVR

Description	HCS12X Microcontrollers

PDF	1348 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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391 / 1348 page

Chapter 8 Pulse-Width Modulator (S12PWM8B8CV1)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

391

Figure 8-24. PWM 16-Bit Mode

Once concatenated mode is enabled (CONxx bits set in PWMCTL register), enabling/disabling the

corresponding 16-bit PWM channel is controlled by the low order PWMEx bit. In this case, the high order

bytes PWMEx bits have no effect and their corresponding PWM output is disabled.

In concatenated mode, writes to the 16-bit counter by using a 16-bit access or writes to either the low or

high order byte of the counter will reset the 16-bit counter. Reads of the 16-bit counter must be made by

16-bit access to maintain data coherency.

PWMCNT6

PWCNT7

PWM7

Clock Source 7

High

Low

Period/Duty Compare

PWMCNT4

PWCNT5

PWM5

Clock Source 5

High

Low

Period/Duty Compare

PWMCNT2

PWCNT3

PWM3

Clock Source 3

High

Low

Period/Duty Compare

PWMCNT0

PWCNT1

PWM1

Clock Source 1

High

Low

Period/Duty Compare

PC312XDP512F0CFVR Datasheet(PDF) 391 Page - Freescale Semiconductor, Inc