R8C2H datasheet(37/67 Pages) RENESAS

37 / 67 page

R8C/2H Group, R8C/2J Group

3. Memory

Rev.1.00

Mar 28, 2008

Page 17 of 341

REJ09B0388-0100

Memory

Figure 3.1 is a Memory Map of R8C/2H Group and Figure 3.2 is a Memory Map of R8C/2J Group. The R8C/2H group

has 1 Mbyte of address space from addresses 00000h to FFFFFh.

The internal ROM is allocated lower addresses, beginning with address 0FFFFh. For example, a 4-Kbyte internal

ROM area is allocated addresses 0F000h to 0FFFFh.

The fixed interrupt vector table is allocated addresses 0FFDCh to 0FFFFh. They store the starting address of each

interrupt routine.

The internal RAM is allocated higher addresses beginning with address 00400h. For example, a 256-bytes internal

RAM area is allocated addresses 00400h to 004FFh. The internal RAM is used not only for storing data but also for

calling subroutines and as stacks when interrupt requests are acknowledged.

Special function registers (SFRs) are allocated addresses 00000h to 002FFh. The peripheral function control registers

are allocated here. All addresses within the SFR, which have nothing allocated are reserved for future use and cannot

be accessed by users.

Figure 3.1

Memory Map of R8C/2H Group

Undefined instruction

Overflow

BRK instruction

Address match

Single step

Watchdog timer/voltage monitor/comparator

(Reserved)

Reset

00400h

002FFh

00000h

Internal RAM

SFR

(Refer to 4. Special

Function Registers

(SFRs)

)

0FFFFh

0FFDCh

NOTE:

1. The blank regions are reserved. Do not access locations in these regions.

FFFFFh

0FFFFh

0YYYYh

Internal ROM

(program ROM)

0XXXh

Part Number

Internal ROM

Internal RAM

Size

R5F212H1SNSP, R5F212H1SDSP

R5F212H2SNSP, R5F212H2SDSP

4 Kbytes

8 Kbytes

0F000h

0E000h

256 bytes

384 bytes

004FFh

0057Fh

Address 0YYYYh

Address 0XXXXh

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