7547 datasheet(10/91 Pages) RENESAS

10 / 91 page

7547 Group

Rev.1.21

Nov 15, 2006

page 10 of 89

REJ03B0156-0121

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.

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. 6 Memory map diagram

ROM capacity

(bytes)

address

YYYY16

address

ZZZZ16

8192

E00016

E08016

16384

C00016

C08016

FF0016

FFDC16

FFD4 16

FFFE16

FFFF16

YYYY16

ZZZZ16

ROM

Function set ROM function area

010016

000016

004016

044016

XXXX16

RAM

Reserved area

SFR area

Not used

RAM area

RAM capacity

(bytes)

address

XXXX16

512

023F16

384

01BF16

Function set ROM consists of the followings:

- Function set ROM data to set peripheral

functions to be active immediately after system

is released from reset,

- ROM code protect to disable the reading of

the built-in PROM area by serial programmer,

- Renesas shipment test area where random

data are written in when shipment test is

performed by Renesas.

ROM area

Reserved ROM area

(128 bytes)

Interrupt vector area

Reserved ROM area

Zero page

Special page

Address

FFD416

FFD516

FFD616

Renesas shipment test are

Renesas shipment test area

FFD716

FFD816

FFD916

FFDA16

FFDB16

Function set ROM data 2

Function set ROM data 1

Function set ROM data 0

ROM code protect

ROM Code Protect Address (address FFDB16)

Address FFDB16, which is the reserved ROM area of QzROM, is

the ROM code protect address. “0016” is written into this address

when selecting the protect bit write by using a serial programmer

or selecting protect enabled for writing shipment by Renesas

Technology corp.. When “0016” is set to the ROM code protect ad-

dress, the protect function is enabled, so that reading or writing

from/to QzROM is disabled by a serial programmer.

As for the QzROM product in blank, the ROM code is protected by

selecting the protect bit write at ROM writing with a serial pro-

grammer.

As for the QzROM product shipped after writing, “0016” (protect

enabled) or “FF16” (protect disabled) is written into the ROM code

protect address when Renesas Technology corp. performs writing.

The writing of “0016” or “FF16” can be selected as the ROM option

setup (referred to as “Mask option setup” in MM) when ordering.

s Notes

Because the contents of RAM are indefinite at reset, set initial val-

ues before using.

7547 датащи(PDF) 10 Page - Renesas Technology Corp

7547 датащи(HTML) 10 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

датащи скачать

ссылки URL