SH7047 Datasheet, PDF (445/764 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTMRISC engine Family/SH7000 Series

14.5.3 Contention between CMCNT Byte Write and Incrementation
If an increment occurs during the T2 state of the CMCNT byte write cycle, the counter write has
priority, so no increment of the write data results on the side on which the write was performed.
The byte data on the side on which writing was not performed is also not incremented, so the
contents are those before the write.
Figure 14.8 shows the timing when an increment occurs during the T2 state of the CMCNTH write
cycle.
CMCNT write cycle
T1 T2
Pφ
Address
CMCNTH
Internal write
signal
CMCNT input
clock
CMCNTH
N
M
CMCNTL
X
CMCNTH write data
X
Figure 14.8 CMCNT Byte Write and Increment Contention
Rev. 2.00, 09/04, page 405 of 720