1) There is a possibility that MTU is set in the module standby mode.
Because MTU is initially set in the module standby mode, it is necessary to clear a pertinent bit of module standby control register (MSTCR), and to release the module standby mode
2) There is a possibility that MTURWE bit is cleared.
Please confirm MTU writing/reading enable bit (MTURWE) of bus control register 1(BCR1) is "1". When MTURWE is "0", the access of the MTU control register is prohibited.
|SH7047, SH7049, SH7105, SH7107, SH7109|
|SH7046, SH7148, SH7101, SH7048, SH7104, SH7106, SH7108|