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What problem occurs if I write the value in reserve bit inside register?

Latest Updated:03/23/2009

Question:

In SH-2/SH-2A, what kind of problem will be occurred when I write the value besides the specified value in the reserve bit inside the register?

Answer:

There might be a problem if the value besides the specified value is written to the reserve bit in the register. The operation when the value besides the specified value is written to the reserve bit in the register is not guaranteed.
Suitable Products
SH7261
SH7211
SH7206
SH7641
SH7124, SH7125
SH7146, SH7149
SH7144, SH7145
SH7606
SH7083, SH7084, SH7085, SH7086
SH7065
SH7058
SH7055
SH7050, SH7051
SH7047, SH7049, SH7105, SH7107, SH7109
SH7046, SH7148, SH7101, SH7048, SH7104, SH7106, SH7108
SH7040, SH7041, SH7042, SH7043, SH7044, SH7045
SH7032
SH7020, SH7021
SH7018
SH7014, SH7016, SH7017
SH7011