TS80C32X2-LCAB Temic Semiconductors (acquired by ATMEL Corporation), TS80C32X2-LCAB Datasheet - Page 10

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TS80C32X2-LCAB

Manufacturer Part Number
TS80C32X2-LCAB
Description
8-bit CMOS Microcontroller 0-60 MHZ
Manufacturer
Temic Semiconductors (acquired by ATMEL Corporation)
Datasheet
TS80C52X2
6.2 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 5.) that allows the program code to switch between them (Refer to Figure 3).
External Data Memory
7
0
DPS
DPTR1
DPTR0
AUXR1(A2H)
DPH(83H) DPL(82H)
Figure 3. Use of Dual Pointer
10
Rev. B - Jan. 25, 1999
Preliminary

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