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6.6 Basic Function of Timer Array Unit
6.6.1 Overview of single-operation function and combination-operation function
The timer array unit consists of several channels and has a single-operation function that allows each channel to
operate independently, and a combination-operation function that uses two or more channels in combination.
The single-operation function can be used for any channel, regardless of the operation mode of the other channels.
The combination-operation function is realized by combining a master channel (reference timer that mainly counts
periods) and a slave channel (timer that operates in accordance with the master channel), and several rules must be
observed when using this function.
6.6.2 Basic rules of combination-operation function
The basic rules of using the combination-operation function are as follows.
(1) Only an even channel (channel 0, 2, 4, etc.) can be set as a master channel.
(2) Any channel, except channel 0, can be set as a slave channel.
(3) The slave channel must be lower than the master channel.
Example: If channel 2 is set as a master channel, channel 3 or those that follow (channels 3, 4, 5, etc.) can
be set as a slave channel.
(4) Two or more slave channels can be set for one master channel.
(5) When two or more master channels are to be used, slave channels with a master channel between them may
not be set.
Example: If channels 0 and 4 are set as master channels, channels 1 to 3 can be set as the slave channels
of master channel 0. Channels 5 to 7 cannot be set as the slave channels of master channel 0.
(6) The operating clock for a slave channel in combination with a master channel must be the same as that of the
master channel. The CKS bit (bit 15 of the TMR0n register) of the slave channel that operates in combination
with the master channel must be the same value as that of the master channel.
(7) A master channel can transmit INTTM0n (interrupt), start software trigger, and count clock to the lower
channels.
(8) A slave channel can use the INTTM0n (interrupt), start software trigger, and count clock of the master channel,
but it cannot transmit its own INTTM0n (interrupt), start software trigger, and count clock to the lower channel.
(9) A master channel cannot use the INTTM0n (interrupt), start software trigger, and count clock from the other
master channel.
(10) To simultaneously start channels that operate in combination, the TS0n bit of the channels in combination
must be set at the same time.
(11) During a counting operation, the TS0n bit of all channels that operate in combination or only the master
channel can be set. TS0n of only a slave channel cannot be set.
(12) To stop the channels in combination simultaneously, the TT0n bit of the channels in combination must be set
at the same time.
Remark
n = 0 to 7
CHAPTER 6 TIMER ARRAY UNIT
User's Manual U17854EJ9V0UD
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