TS80C31X2-VIE datasheet(10/42 Pages) ATMEL

Nome de Peças	TS80C31X2-VIE

Descrição Electrónicos	8-bit CMOS Microcontroller ROMless

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Fabricante Electrônico	ATMEL [ATMEL Corporation]

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10

4428E–8051–02/08

AT/TS80C31X2

8.

Application

Software can take advantage of the additional data pointers to both increase speed and reduce

code size, for example, block operations (copy, compare, search ...) are well served by using

one data pointer as a ’source’ pointer and the other one as a "destination" pointer.

ASSEMBLY LANGUAGE

; Block move using dual data pointers

; Destroys DPTR0, DPTR1, A and PSW

; note: DPS exits opposite of entry state

; unless an extra INC AUXR1 is added

;

00A2

AUXR1 EQU 0A2H

;

0000 909000

MOV

DPTR,#SOURCE

; address of SOURCE

0003 05A2

INC

AUXR1

; switch data pointers

0005 90A000

MOV

DPTR,#DEST

; address of DEST

0008

LOOP:

0008 05A2

INC

AUXR1

; switch data pointers

000A E0

MOVX A,@DPTR

; get a byte from SOURCE

000B A3

INC

DPTR

; increment SOURCE address

000C 05A2

INC

AUXR1

; switch data pointers

000E F0

MOVX @DPTR,A

; write the byte to DEST

000F A3

INC

DPTR

; increment DEST address

0010 70F6

JNZ

LOOP

; check for 0 terminator

0012 05A2

INC

AUXR1

; (optional) restore DPS

INC is a short (2 bytes) and fast (12 clocks) way to manipulate the DPS bit in the AUXR1 SFR.

However, note that the INC instruction does not directly force the DPS bit to a particular state,

but simply toggles it. In simple routines, such as the block move example, only the fact that DPS

is toggled in the proper sequence matters, not its actual value. In other words, the block move

routine works the same whether DPS is '0' or '1' on entry. Observe that without the last instruc-

tion (INC AUXR1), the routine will exit with DPS in the opposite state.

Nº de peça semelhante - TS80C31X2-VIE

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
TEMIC Semiconductors	TS80C31X2-VIEB	484Kb / 40P	8-bit CMOS Microcontroller 0-60 MHz
	TS80C31X2-VIED	484Kb / 40P	8-bit CMOS Microcontroller 0-60 MHz
	TS80C31X2-VIER	484Kb / 40P	8-bit CMOS Microcontroller 0-60 MHz

More results

Descrição semelhante - TS80C31X2-VIE

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
ATMEL Corporation	TS80C31X2	601Kb / 42P	8-bit CMOS Microcontroller ROMless
Zilog, Inc.	Z86C90	96Kb / 14P	ROMLESS CMOS Z8 8-BIT MICROCONTROLLER
Siemens Semiconductor G...	SDA30C263	6Mb / 120P	8-Bit Microcontroller ROMLESS
	SDA30C163-2	6Mb / 95P	8-bIT Microcontroller, ROMLESS
	SDA30C164	7Mb / 100P	8-bIT Microcontroller, ROMLESS
NXP Semiconductors	OM5202	93Kb / 11P	ROMless 8-bit microcontroller December 1994
ATMEL Corporation	80C32E	298Kb / 20P	Rad. Tolerant 8-bit ROMless Microcontroller
AIMTEC	80C32E	206Kb / 20P	Rad. Tolerant 8-bit ROMless Microcontroller
ATMEL Corporation	80C32E	284Kb / 20P	Rad. Tolerant 8-bit ROMless Microcontroller
Zilog, Inc.	Z8609316PSG	362Kb / 18P	ROMLESS CMOS 8-BIT Z8 MCU

More results

TS80C31X2-VIE Folha de dados(PDF) 10 Page - ATMEL Corporation

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