80C54X2 데이터 시트보기 (PDF) - Temic Semiconductors

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80C54X2

8-bit CMOS Microcontroller 0-60 MHz

Temic Semiconductors 

Table 5. AUXR1: Auxiliary Register 1

TS80C54X2/C58X2

TS87C54X2/C58X2

7

6

5

4

3

2

1

0

-

-

-

-

GF3

-

-

DPS

Bit

Number

7

6

5

4

3

2

1

0

Bit

Mnemonic

Description

-

Reserved

The value read from this bit is indeterminate. Do not set this bit.

-

Reserved

The value read from this bit is indeterminate. Do not set this bit.

-

Reserved

The value read from this bit is indeterminate. Do not set this bit.

-

Reserved

The value read from this bit is indeterminate. Do not set this bit.

GF3

Reserved

This bit is a general purpose user flag

-

Reserved

The value read from this bit is indeterminate. Do not set this bit.

-

Reserved

The value read from this bit is indeterminate. Do not set this bit.

Data Pointer Selection

DPS

Clear to select DPTR0.

Set to select DPTR1.

User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new feature. In that case, the reset

value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate.

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.

Rev. B - Aug. 31, 1999

11

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