Renesas RL78 Series User Manual

RL78/F13, F14 CHAPTER 3 CPU ARCHITECTURE
R01UH0368EJ0210 Rev.2.10 120
Dec 10, 2015
3.1.3 Internal data memory space
The RL78/F13 and RL78/F14 products incorporate the following RAMs.
Table 3-4. Internal RAM Capacity
Part Number Internal RAM
R5F10AmA (m = 6, A, B, G) 1 Kbyte (FFB00H to FFEFFH)
R5F10AmC (m = 6, A, B, G, L) 2 Kbytes (FF700H to FFEFFH)
R5F10BmC (m = A, B, G, L)
R5F10AmD (m = 6, A, B, G, L) 3 Kbytes (FF300H to FFEFFH)
R5F10BmD (m = A, B, G, L)
R5F10PmD (m = A, B, G) 4 Kbytes (FEF00H to FFEFFH)
R5F10AmE (m = 6, A, B, G, L, M)
R5F10BmE (m = A, B, G, L, M)
R5F10PmE (m = A, B, G, L, M, P) 6 Kbytes (FE700H to FFEFFH)
R5F10AmF (m = G, L, M)
R5F10BmF (m = A, B, G, L, M)
R5F10PmF (m = G, L, M, P) 8 Kbytes (FDF00H to FFEFFH)
R5F10AmG (m = G, L, M)
R5F10BmG (m = A, B, G, L, M)
R5F10PmG (m = G, L, M, P) 10 Kbytes (FD700H to FFEFFH)
R5F10PmH (m = G, L, M, P) 16 Kbytes (FBF00H to FFEFFH)
R5F10PmJ (m = G, L, M, P) 20 Kbytes (FAF00H 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 a 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. Do not allocate RAM addresses which are used as stack area, data buffers used by the libraries,
branch destinations for vectored interrupt servicing, or DTC transfer destinations/transfer
sources to the area FFE20H to FFEDFH when performing self-programming and rewriting the data
flash memory.
3. Using the listed RAM areas in the corresponding products below is prohibited since the
respective libraries use them in self-programming and overwriting of the data flash memory.
However, the area to which this prohibition applies may vary with the version of the library. For
details, refer to the manuals for the individual libraries.
R5F10AmE (m = 6, A, B, G, L): FEF00H to FF2FFH
R5F10PmF (m = G, L, M): FDF00H to FE2FFH
R5F10AmG (m = G, L, M), R5F10BnG (n = A, B, G, L, M): FDF00H to FE2FFH
R5F10PmJ (m = G, L, M, P): FAF00H to FB2FFH

Renesas RL78 Series Specifications

General

Brand	Renesas
Model	RL78 Series
Category	Computer Hardware
Language	English