Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 用户手册
产品代码
DEMO9S12XHY256
Pulse-Width Modulator (S12PWM8B8CV1)
MC9S12XHY-Family Reference Manual, Rev. 1.04
Freescale Semiconductor
449
Figure 13-24. 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.
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.
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