RL78/G13 CHAPTER 3 CPU ARCHITECTURE
R01UH0146EJ0100 Rev.1.00 119
Sep 22, 2011
3.1.3 Internal data memory space
The RL78/G13 products incorporate the following RAMs.
Table 3-4. Internal RAM Capacity
Part Number Internal RAM
R5F100xA, R5F101xA (x = 6 to 8, A to C, E to G)
R5F100xC, R5F101xC (x = 6 to 8, A to C, E to G, J, L)
2048 × 8 bits (FF700H to FFEFFH)
R5F100xD, R5F101xD (x = 6 to 8, A to C, E to G, J, L)
3072 × 8 bits (FF300H to FFEFFH)
R5F100xE, R5F101xE (x = 6 to 8, A to C, E to G, J, L)
4096 × 8 bits (FEF00H to FFEFFH)
R5F100xF, R5F101xF (x = A to C, E to G, J, L, M, P)
8192 × 8 bits (FDF00H to FFEFFH)
R5F100xG, R5F101xG (x = A to C, E to G, J, L, M, P)
12288 × 8 bits (FCF00H to FFEFFH)
R5F100xH, R5F101xH (x = E to G, J, L, M, P, S)
16384 × 8 bits (FBF00H to FFEFFH)
R5F100xJ, R5F101xJ (x = F, G, J, L, M, P, S)
20480 × 8 bits (FAF00H to FFEFFH)
R5F100xK, R5F101xK (x = F, G, J, L, M, P, S)
24576 × 8 bits (F9F00H to FFEFFH)
R5F100xL, R5F101xL (x = F, G, J, L, M, P, S)
32768 × 8 bits (F7F00H to FFEFFH)
The internal RAM can be used as a data area and a program area where instructions are written and executed. Four
general-purpose register banks consisting of eight 8-bit registers per bank are assigned to the 32-byte area of FFEE0H to
FFEFFH of the internal RAM area. However, instructions cannot be executed by using the general-purpose registers.
The internal RAM is used as stack memory.
Cautions 1. It is prohibited to use the general-purpose register (FFEE0H to FFEFFH) space for fetching
instructions or as a stack area.
2. The internal RAM in the following products cannot be used as stack memory when using the self-
programming function and data flash function.
R5F100xD, R5F101xD (x = 6 to 8, A to C, E to G, J, L): FF300H to FF309H
R5F100xE, R5F101xE (x = 6 to 8, A to C, E to G, J, L): FEF00H to FF309H
R5F100xJ, R5F101xJ (x = F, G, J, L, M, P): FAF00H to FB309H
R5F100xL, R5F101xL (x = F, G, J, L, M, P, S): F7F00H to F8309H
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