Preliminary User’s Manual U16846EJ1V0UD
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CHAPTER 3 CPU ARCHITECTURE
3.1 Memory Space
Products in the 78K0/KB1+ can each access a 64 KB memory space. Figures 3-1 to 3-3 show the memory maps.
Caution Regardless of the internal memory capacity, the initial values of internal memory size switching
register (IMS) of all products in the 78K0/KB1+ are fixed (IMS = CFH). Therefore, set the value
corresponding to each product as indicated below. In addition, set the following values to the
internal memory size switching register (IMS) when using the 78K0/KB1+ to evaluate the program
of a mask ROM version of the 78K0/KB1.
Table 3-1. Internal Memory Size Switching Register (IMS) Set Value
Flash Memory Version
(78K0/KB1+)
Target Mask ROM Version
(78K0/KB1)
Internal Memory Size
Switching Register (IMS)
µ
PD78F0101H
µ
PD780101 42H
µ
PD78F0102H
µ
PD780102 04H
µ
PD78F0103H
µ
PD780103 06H