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R01UH0336EJ0102 Rev.1.02
Page 628 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 14 Timer Array Unit J (TAUJ)
14.6 Concepts of Synchronous Channel Operation
In synchronous channel operation, multiple channels depend on each other, or
are affected by changes in other channels. Therefore, several rules apply to
the use of synchronous channel functions. These rules are detailed in Section
14.6.1, Rules.
Two special features for synchronous channel operation are detailed in the
following parts.
• Section 14.6.2, Simultaneous Start and Stop of Synchronous Channel
• Section 14.7, Simultaneous Rewrite
14.6.1
Rules
Number of master
and slave channels
• Only even channels (CH0, CH2) can be set as master channels. Any
channel apart from CH0 can be set as a slave channel.
• Only channels lower than the master channel can be set as slave channels,
and several slave channels can be set for one master channel.
Example: If CH2 is a master channel, CH3 can be set as slave channel.
• If two master channels are used, slave channels cannot cross the master.
Example: If CH0 and CH2 are master channels, CH1 can be set as slave
channels for CH0, but CH3 cannot.
Count clock
• The same count clock should be set for the master channel and the slave
channels synchronizing to the master channel. This is achieved by setting
the same value in the TAUJnCMORm.TAUJnCKS[1:0] bits of the master
and slave channels.
The basic concepts of master/slave usage and count clocks are illustrated in
the following figure.