R8C datasheet(16/60 Pages) RENESAS

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R8C/38A Group

3. Memory

REJ03B0274-0120 Rev.1.20

Page 16 of 57

Jul 31, 2010

Memory

3.1

R8C/38A Group

Figure 3.1 is a Memory Map of R8C/38A Group. The R8C/38A Group has a 1-Mbyte address space from addresses

00000h to FFFFFh. The internal ROM (program ROM) is allocated lower addresses, beginning with address

0FFFFh. For example, a 64-Kbyte internal ROM area is allocated addresses 04000h to 13FFFh.

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

routine is stored here.

The internal ROM (data flash) is allocated addresses 03000h to 03FFFh.

The internal RAM is allocated higher addresses, beginning with address 00400h. For example, a 6-Kbyte internal

RAM area is allocated addresses 00400h to 01BFFh. The internal RAM is used not only for data storage but also as

a stack area when a subroutine is called or when an interrupt request is acknowledged.

Special function registers (SFRs) are allocated addresses 00000h to 002FFh and 02C00h to 02FFFh (the SFR areas

for the DTC and other modules). Peripheral function control registers are allocated here. All unallocated spaces

within the SFRs are reserved and cannot be accessed by users.

Figure 3.1

Memory Map of R8C/38A Group

0FFFFh

0FFDCh

Notes:

1. The data flash indicates block A (1 Kbyte), block B (1 Kbyte), block C (1 Kbyte), and block D (1 Kbyte).

2. The SFR areas for the DTC and other modules are allocated to addresses 02C00h to 02FFFh.

3. The blank areas are reserved and cannot be accessed by users.

FFFFFh

0FFFFh

0YYYYh

0XXXXh

00400h

002FFh

00000h

Internal ROM

(program ROM)

Internal RAM

SFR

(Refer to 4. Special Function

Registers (SFRs))

02FFFh

02C00h

SFR (2)

(Refer to 4. Special Function

Registers (SFRs))

ZZZZZh

03FFFh

03000h

Internal ROM

(data flash) (1)

Internal ROM

(program ROM)

Undefined instruction

Overflow

BRK instruction

Address match

Single step

Watchdog timer, oscillation stop detection, voltage monitor

Address break

(Reserved)

Reset

Internal RAM

Size

Address 0XXXXh

2.5 Kbytes

4 Kbytes

6 Kbytes

8 Kbytes

10 Kbytes

00DFFh

013FFh

01BFFh

023FFh

02BFFh

Part Number

Internal ROM

Size

Address 0YYYYh

R5F21386ANFP, R5F21386ANLG

R5F21386ANXXXFP, R5F21386ANXXXLG

R5F21387ANFP, R5F21387ANLG

R5F21387ANXXFP, R5F21387ANXXXLG

R5F21388ANFP, R5F21388ANLG

R5F21388ANXXXFP, R5F21388ANXXXLG

R5F2138AANFP, R5F2138AANLG

R5F2138AANXXXFP, R5F2138AANXXXLG

R5F2138CANFP, R5F2138CANLG

R5F2138CANXXXFP, R5F2138CANXXXLG

32 Kbytes

48 Kbytes

64 Kbytes

96 Kbytes

128 Kbytes

08000h

04000h

Address ZZZZZh

–

13FFFh

1BFFFh

23FFFh

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