UPD78F0411GA-GAM-AX Datasheet, PDF (510/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 24 FLASH MEMORY
The 78K0/LC3 incorporates the flash memory to which a program can be written, erased, and overwritten while
mounted on the board.
24.1 Internal Memory Size Switching Register
The internal memory capacity can be selected using the internal memory size switching register (IMS).
IMS is set by an 8-bit memory manipulation instruction.
Reset signal generation sets IMS to CFH.
Caution Be sure to set each product to the values shown in Table 24-1 after a reset release.
Figure 24-1. Format of Internal Memory Size Switching Register (IMS)
Address: FFF0H After reset: CFH R/W
Symbol
7
6
5
4
3
2
1
0
IMS
RAM2
RAM1
RAM0
0
ROM3
ROM2
ROM1
ROM0
RAM2
RAM1
RAM0
0
0
0
0
1
0
1
1
0
Other than above
Internal high-speed RAM capacity selection
768 bytes
512 bytes
1024 bytes
Setting prohibited
ROM3
0
0
0
1
ROM2
ROM1
0
1
1
0
1
1
0
0
Other than above
ROM0
0
0
0
0
Internal ROM capacity selection
8 KB
16 KB
24 KB
32 KB
Setting prohibited
Table 24-1. Internal Memory Size Switching Register Settings
Flash Memory Version (78K0/LC3) IMS Setting
μPD78F0400, 78F0410
42H
μPD78F0401, 78F0411
04H
μPD78F0402, 78F0412
C6H
μPD78F0403, 78F0413
C8H
ROM Capacity
8 KB
16 KB
24 KB
32 KB
Internal High-Speed RAM Capacity
512 bytes
768 bytes
1 K bytes
508
User’s Manual U18698EJ1V0UD