MC68HC908LD64 Datasheet, PDF (166/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

Timer Interface Module (TIM)
Data Sheet
166
an output compare channel, CHxF is set when the value in the TIM
counter registers matches the value in the TIM channel x registers.
When TIM CPU interrupt requests are enabled (CHxIE=1), clear
CHxF by reading the TIM channel x status and control register with
CHxF set and then writing a logic zero to CHxF. If another interrupt
request occurs before the clearing sequence is complete, then writing
logic zero to CHxF has no effect. Therefore, an interrupt request
cannot be lost due to inadvertent clearing of CHxF.
Reset clears the CHxF bit. Writing a logic one to CHxF has no effect.
1 = Input capture or output compare on channel x
0 = No input capture or output compare on channel x
CHxIE — Channel x Interrupt Enable Bit
This read/write bit enables TIM CPU interrupt service requests on
channel x. Reset clears the CHxIE bit.
1 = Channel x CPU interrupt requests enabled
0 = Channel x CPU interrupt requests disabled
MSxB — Mode Select Bit B
This read/write bit selects buffered output compare/PWM operation.
MSxB exists only in the TIM channel 0 status and control register.
Setting MS0B disables the channel 1 status and control register and
reverts TCH1 to general-purpose I/O.
Reset clears the MSxB bit.
1 = Buffered output compare/PWM operation enabled
0 = Buffered output compare/PWM operation disabled
MSxA — Mode Select Bit A
When ELSxB:A ≠ 0:0, this read/write bit selects either input capture
operation or unbuffered output compare/PWM operation.
See Table 11-3.
1 = Unbuffered output compare/PWM operation
0 = Input capture operation
When ELSxB:A = 0:0, this read/write bit selects the initial output level
of the TCHx pin. (See Table 11-3.) Reset clears the MSxA bit.
1 = Initial output level low
0 = Initial output level high
Timer Interface Module (TIM)
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor