Renesas SH7709S Manual Do Utilizador
Rev. 5.00, 09/03, page 350 of 760
CH1
>
CH2
>
CH3
>
CH0
CH0
>
CH1
>
CH2
>
CH3
CH2
>
CH3
>
CH0
>
CH1
CH0
>
CH1
>
CH2
>
CH3
CH2
>
CH3
>
CH0
>
CH1
CH0
>
CH1
>
CH2
>
CH3
CH0
>
CH1
>
CH2
>
CH3
CH3
>
CH0
>
CH1
>
CH2
CH0
>
CH1
>
CH2
>
CH3
(1) When channel 0 transfers
Initial priority order
Initial priority order
Initial priority order
Priority order
after transfer
after transfer
Priority order
after transfer
after transfer
Priority order does not change.
Channel 2 becomes lowest-
priority.
The priority of channels 0 and 1,
which were higher than channel 2,
are also shifted. If immediately
after there is a request to transfer
channel 1 only, channel 1 becomes
lowest-priority and the priority of
channels 3 and 0, which were
higher than channel 1, is also
shifted.
priority.
The priority of channels 0 and 1,
which were higher than channel 2,
are also shifted. If immediately
after there is a request to transfer
channel 1 only, channel 1 becomes
lowest-priority and the priority of
channels 3 and 0, which were
higher than channel 1, is also
shifted.
Channel 1 becomes lowest-
priority.
The priority of channel 0, which
was higher than channel 1, is also
shifted.
priority.
The priority of channel 0, which
was higher than channel 1, is also
shifted.
Channel 0 becomes lowest-
priority.
priority.
Priority order
after transfer
after transfer
Priority order
after transfer
after transfer
Priority order
after transfer
after transfer
Post-transfer priority order
when there is an
immediate transfer
request to channel 1 only
when there is an
immediate transfer
request to channel 1 only
(2) When channel 1 transfers
(3) When channel 2 transfers
(4) When channel 3 transfers
Figure 11.3 Round-Robin Mode