Rev. 1.0, 02/00, page 610 of 1141
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Example of operation in single mode (20 stages of FIFO used)
1
Set to single mode (LOP = 0)
2
Write the output pattern data (PA0) to FPDRA.
3
Write the output timing (t
A1
) to FTPRA. t
A1
is written in FIFO1 together with PA0. This
initializes the output pattern data to PA0.
4
Repeat the steps in the same way, until PA1, PA2, etc., are set.
5
Write the output pattern data (PB0) to FPDRB.
6
Write the output timing (t
B1
) to FTPRB. t
B1
is written in FIFO2 together with PB0. This
initializes the output pattern data to PB0.
7
Repeat these steps in the same way, until PB1, PB2, etc., are set.
By step 3, the pattern data of PA0 is output.
If t
A1
matches with the timer counter, the pattern data of PA1 is output.
If t
A2
matches with the timer counter, the pattern data of PA2 is output.
.
.
.
After this sequence is repeated and all the pattern data set in FIFO1 is output, the pattern data of
FIFO2 is output. After the pattern data is output, the pointer is decremented by 1. Care is
required, however, because matching of t
A0
is not detected until data is written in FIFO2.
Matching of t
B0
also is not detected until data is written in FIFO1 again.