TS80C58X2_14 datasheet(11/62 Pages) ATMEL

Part #	TS80C58X2

Description	Programmable Clock Out and Up/Down Timer/Counter 2

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Manufacturer	ATMEL [ATMEL Corporation]

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11

4431E–8051–04/06

AT/TS8xC54/8X2

7.

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)

0

7

DPTR0

DPTR1

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