SH7055S Datasheet, PDF (448/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Contention between DTR Write and BFR Value transfer by Buffer Function: In channels 6
and 7, if there is contention between transfer of the buffer register (BFR) value to the
corresponding duty register (DTR) due to a cycle register (CYLR) compare-match, and a write to
DTR by the CPU, the CPU write value is written to DTR.
Figure 11.68 shows an example in which contention arises when the BFR value is H'AAAA and
the value to be written to DTR is H'5555.
Pø
Address
Internal write signal
Compare-match signal
DTR address
H'5555
written
to DTR
BFR
H'AAAA
DTR
H'5555
Figure 11.68 Contention between DTR Write and BFR Value Transfer by Buffer Function
Rev.2.0, 07/03, page 410 of 960