R01UH0822EJ0100 Rev.1.00
Page 486 of 1041
Jul 31, 2019
RX13T Group
19. Multi-Function Timer Pulse Unit 3 (MTU3c)
19.6.8
Contention between Buffer Register Write and TCNT Clear Operations
When the buffer transfer timing is set at the TCNT clear timing by the timer buffer transfer mode register (TBTM), if
TCNT clearing occurs in the TGR write cycle, the data before write operation is transferred to TGR by the buffer
operation.
shows the timing in this case.
Figure 19.127
Contention between Buffer Register Write and TCNT Clear Operations
19.6.9
Contention between TGR Read Operation and Input Capture
If an input capture signal is generated in a TGR read cycle, the data before input capture transfer is read.
shows the timing in this case.
Figure 19.128
Contention between TGR Read Operation and Input Capture (MTU0 to MTU5)
TCNT clear signal
Buffer transfer signal
N
N
M
TGR
Buffer register write data
Buffer register
Written by CPU
PCLKB
Input capture signal
N
TGR
M
N
Internal data bus
Read by CPU
PCLKB