mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 391

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

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.
Freescale Semiconductor
Clock Source 7
Clock Source 5
Clock Source 3
Clock Source 1
MC9S12XDP512 Data Sheet, Rev. 2.17
Figure 8-24. PWM 16-Bit Mode
PWMCNT6
PWMCNT4
PWMCNT2
PWMCNT0
High
High
High
High
Period/Duty Compare
Period/Duty Compare
Period/Duty Compare
Period/Duty Compare
PWCNT7
PWCNT5
PWCNT3
PWCNT1
Chapter 8 Pulse-Width Modulator (S12PWM8B8CV1)
Low
Low
Low
Low
PWM7
PWM5
PWM3
PWM1
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