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Renesas Electronics America - Knowledgebase

Does 0XXXXh area is like a 16 bit address space?

Latest Updated:08/01/2005


For the UPD72107, the memory of receive buffer specifies the 1XXXXh area, but it looks like the data is written to the 0XXXXh area.
I.e., it looks like a 16-bit address space (A17 to A23 = shadow?)


Regarding reception and all the tables, allocations to space A16 to A23 is also possible.
A16 to A23 are pins shared with higher data I/O in the word mode.

Therefore, it is necessary to perform address latching to external.
Also, the order of H, M, and L in each table can be changed with the DBOM parameter.

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