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22 16-bit Timer/Counter Type B (TCB)
22.3 Functional Description
22.3.3 Operation
22.3.3.2 Output
If ASYNC in TCBn.CTRLB is written to '0' ('1'), the output pin is driven synchronously (asynchronously) to the TCB clock. The CCMPINIT, CCMPEN, and CNTMODE bits in TCBn.CTRLB control how the synchronous output is driven. The different configurations and their impact on the output are listed in the table below.

ATtiny1614/1616/1617 Automotive

22.3.3.2 Output

If ASYNC in TCBn.CTRLB is written to '0' ('1'), the output pin is driven synchronously (asynchronously) to the TCB clock. The CCMPINIT, CCMPEN, and CNTMODE bits in TCBn.CTRLB control how the synchronous output is driven. The different configurations and their impact on the output are listed in the table below.

Table 22-3. Synchronous Output
CNTMODE	Output, CTRLB=’0’, CCMPEN=1	Output, CTRLB=’1’, CCMPEN=1
Single-Shot mode	Output high when the counter starts and output low when the counter stops	Output high when event arrives and output low when the counter stops
8-bit PWM mode	PWM mode output	PWM mode output
Modes except single shot and PWM	Bit CCMPINIT in TCBn.CTRLB	Bit CCMPINIT in TCBn.CTRLB

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