Renesas RX100 Series User Manual page 451

RX13T Group
Figure 19.75 shows an example when the buffer write value is smaller than the TDDRA value, and Figure 19.76
shows an example when the write value is greater than TCDRA.
In the crest interval, the output is controlled according to the compare match with the compare register or temporary
register A; in the trough interval, the output is controlled according to the compare match with the compare register or
temporary register B.
MTU3.TGRA
TCDRA
MTU4.TGRB
TDDRA
MTU4.TGRD
(buffer A)
MTU4.TGRF
(buffer B)
Temp3A
(temporary A)
Temp3B
(temporary B)
MTU4.TGRB
(compare)
MTIOC4B(output)
MTIOC4D(output)
Figure 19.75 Example of Double Buffer Operation (Buffer Write Value is Smaller than TDDRA)
MTU3.TGRA
TCDRA
MTU4.TGRB
TDDRA
MTU4.TGRD
(buffer A)
MTU4.TGRF
(buffer B)
Temp3A
(temporary A)
Temp3B
(temporary B)
MTU4.TGRB
(compare)
MTIOC4B (output)
MTIOC4D(output)
Figure 19.76 Example of Double Buffer Operation (Buffer Write Value is Greater than TCDRA)
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
(1)
TCNTSA
MTU4.
MTU4.
TCNT
TCNT
(2)
Buffer A modified
1111h 1011h
Buffer B modified
1110h 1010h
1111h 1011h
1110h 1010h
1110h 1111h
(1)
TCNTSA
MTU3.
TCNT MTU4.
TCNT
(2)
Buffer A modified
1111h 1211h
Buffer B modified
1110h 1210h
1111h 1211h
1110h 1210h
1110h 1111h
19. Multi-Function Timer Pulse Unit 3 (MTU3c)
(1)
(2)
1010h 1011h
(1)
(2)
1210h 1211h
(1)
(2)
1010h 1011h
(1)
(2)
1210h 1211h
Page 451 of 1041