AT80C58X2_14 datasheet(11/62 Pages) ATMEL

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AT80C58X2 Datasheet(PDF) 11 Page - ATMEL Corporation

Part #	AT80C58X2

Description	8051 pin and instruction compatible

Download	62 Pages

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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11 / 62 page

4431E–8051–04/06

AT/TS8xC54/8X2

Dual Data Pointer Register Ddptr

The additional data pointer can be used to speed up code execution and reduce code size in a

number of ways.

The dual DPTR structure is a way by which the chip will specify the address of an external data

memory location. There are two 16-bit DPTR registers that address the external memory, and a

single bit called

DPS = AUXR1/bit0 (See Table 7-1.) that allows the program code to switch between them

(Refer to Figure 7-1).

Figure 7-1.

Use of Dual Pointer

External Data Memory

AUXR1(A2H)

DPS

DPH(83H) DPL(82H)

DPTR0

DPTR1

Manufacturer	Part #	Datasheet	Description
ATMEL Corporation	AT80C58X2ZZZ-3CSUL	527Kb / 62P	8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
	AT80C58X2ZZZ-3CSUM	527Kb / 62P	8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
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	AT80C58X2ZZZ-RLTUL	527Kb / 62P	8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
	AT80C58X2ZZZ-RLTUM	527Kb / 62P	8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP

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