Datasheet

78K0/Ix2 CHAPTER 3 CPU ARCHITECTURE
R01UH0010EJ0500 Rev.5.00 42
Feb 28, 2012
CHAPTER 3 CPU ARCHITECTURE
3.1 Memory Space
Products in the 78K0/Ix2 microcontrollers can access a 64 KB memory space. Figures 3-1 to 3-3 show the memory maps.
Caution Reset signal generation makes the setting of the ROM area undefined. Therefore, set the value
corresponding to each product as indicated below after release of reset.
Table 3-1. Set Values of Internal Memory Size Switching Register (IMS)
Products
78K0/IY2 78K0/IA2 78K0/IB2
IMS ROM Capacity
Internal High-Speed
RAM Capacity
 PD78F0740,
78F0750
 
61H 4 KB 384 bytes
 PD78F0741,
78F0751
 PD78F0743,
78F0753
 PD78F0745,
78F0755
42H 8 KB 512 bytes
 PD78F0742,
78F0752
 PD78F0744,
78F0754
 PD78F0746,
78F0756
04H 16 KB 768 bytes