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MTU doesn't work. What are the causes?

Latest Updated:03/25/2009

Question:

MTU doesn't work. What are the causes?

Answer:

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.

Suitable Products
SH7144, SH7145
SH7047, SH7049, SH7105, SH7107, SH7109
SH7046, SH7148, SH7101, SH7048, SH7104, SH7106, SH7108