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Timer Interface (TIM)
Advance Information
MC68HC08AS32
—
Rev. 3.0
212
Timer Interface (TIM)
MOTOROLA
16.4.3.2 Buffered Output C ompare
Channels 0 and 1 can be linked to form a buffered output compare
channel whose output appears on the PTE2/TCH0 pin. The TIM channel
registers of the linked pair alternately control the output.
Setting the MS0B bit in TIM channel 0 status and control register (TSC0)
links channel 0 and channel 1. The output compare value in the TIM
channel 0 registers initially controls the output on the PTE2/TCH0 pin.
Writing to the TIM channel 1 registers enables the TIM channel 1
registers to synchronously control the output after the TIM overflows. At
eachsubsequentoverflow,theTIMchannelregisters(0or1)thatcontrol
the output are the ones written to last. TSC0 controls and monitors the
buffered output compare function, and TIM channel 1 status and control
register (TSC1) is unused. While the MS0B bit is set, the channel 1 pin,
PTE3/TCH1, is available as a general-purpose I/O pin.
Channels 2 and 3 can be linked to form a buffered output compare
channel whose output appears on the PTF0/TCH2 pin. The TIM channel
registers of the linked pair alternately control the output.
Setting the MS2B bit in TIM channel 2 status and control register (TSC2)
links channel 2 and channel 3. The output compare value in the TIM
channel 2 registers initially controls the output on the PTF0/TCH2 pin.
Writing to the TIM channel 3 registers enables the TIM channel 3
registers to synchronously control the output after the TIM overflows. At
eachsubsequentoverflow,theTIMchannelregisters(2or3)thatcontrol
the output are the ones written to last. TSC2 controls and monitors the
buffered output compare function, and TIM channel 3 status and control
register (TSC3) is unused. While the MS2B bit is set, the channel 3 pin,
PTF1/TCH3, is available as a general-purpose I/O pin.
Channels 4 and 5 can be linked to form a buffered output compare
channel whose output appears on the PTF2/TCH4 pin. The TIM channel
registers of the linked pair alternately control the output.
Setting the MS4B bit in TIM channel 4 status and control register (TSC4)
links channel 4 and channel 5. The output compare value in the TIM
channel 4 registers initially controls the output on the PTF2/TCH4 pin.
Writing to the TIM channel 5 registers enables the TIM channel 5