SAB-C505C-4E 查看數據表（PDF） - Infineon Technologies

零件编号

产品描述 (功能)

比赛名单

SAB-C505C-4E

8-bit Single-chip Microcontroller

Infineon Technologies 

C505 / C505C

C505A / C505CA

Multiple Datapointers

As a functional enhancement to the standard 8051 architecture, the C505 contains eight 16-bit

datapointers instead of only one datapointer. The instruction set uses just one of these datapointers

at a time. The selection of the actual datapointer is done in the special function regsiter DPSEL.

Figure 8 illustrates the datapointer addressing mechanism.

- - - - - .2 .1 .0

DPSEL(92 H)

DPSEL

Selected

Data-

.2 .1 .0 pointer

0 0 0 DPTR 0

0 0 1 DPTR 1

0 1 0 DPTR 2

0 1 1 DPTR 3

1 0 0 DPTR 4

1 0 1 DPTR 5

1 1 0 DPTR 6

1 1 1 DPTR 7

DPTR7

DPH(83H) DPL(82H)

DPTR0

External Data Memory

MCD00779

Figure 8

External Data Memory Addressing using Multiple Datapointers

Data Sheet

16

08.00

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