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Is it necessary to set DBR Register in 4-Mbyte mode to every data access?

Latest Updated:03/08/2012

Question:

Is it necessary to set the DBR Register in the 4-Mbyte mode (memory space expansion mode 2) for every data access to the bank area?

Answer:

It is unnecessary to set the DBR Register for every data access to the same bank area. Please change the bank by the BSR2 to BSR0 bits of the DBR Register for the data access to any different bank area.
Suitable Products
M16C/62N
M16C/62P
M16C/63
M16C/64A
M16C/64C
M16C/65
M16C/65C