M37542F4SP datasheet(17/122 Pages) RENESAS

17 / 122 page

7542 Group

Rev.3.03

Jul 11, 2008

Page 17 of 117

REJ03B0006-0303

Memory

Special function register (SFR) area

The SFR area in the zero page contains control registers such as

I/O ports and timers.

RAM

RAM is used for data storage and for a stack area of subroutine

calls and interrupts.

ROM

The first 128 bytes and the last 2 bytes of ROM are reserved for

device testing and the rest is a user area for storing programs.

The reserved ROM area can program/erase in the flash memory

version.

Interrupt vector area

The interrupt vector area contains reset and interrupt vectors.

Zero page

The 256 bytes from addresses 000016 to 00FF16 are called the

zero page area. The internal RAM and the special function regis-

ters (SFR) are allocated to this area.

The zero page addressing mode can be used to specify memory

and register addresses in the zero page area. Access to this area

with only 2 bytes is possible in the zero page addressing mode.

Special page

The 256 bytes from addresses FF0016 to FFFF16 are called the

special page area. The special page addressing mode can be

used to specify memory addresses in the special page area. Ac-

cess to this area with only 2 bytes is possible in the special page

addressing mode.

Fig. 15 Memory map diagram

010016

000016

004016

044016

FF0016

FFDC16

FFFE16

FFFF16

384

512

1024

XXXX16

01BF16

023F16

043F16

8192

16384

32768

E00016

C00016

800016

E08016

C08016

808016

YYYY16

ZZZZ16

RAM

ROM

Reserved area

SFR area

Not used

Interrupt vector area

ROM area

Reserved ROM area

(128 bytes)

Zero page

Special page

RAM area

RAM capacity

(bytes)

address

XXXX16

ROM capacity

(bytes)

address

YYYY16

Reserved ROM area

address

ZZZZ16

Not used

SFR area (Note 1)

0FE016

0FFF16

Notes 1: Only flash memory version has this SFR area.

2: The reserved ROM area can program/erase in the flash memory version.

Note the difference of the mask version.

M37542F4SP Datasheet(PDF) 17 Page - Renesas Technology Corp

M37542F4SP Datasheet(HTML) 17 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL