MPC89L51AF 参数 Datasheet PDF下载

Note for Other SFR

SFR:

AUXR

Bits-7

-

Bits-6

-

Bits-5

-

Bits-4

-

Bits-3

-

Bits-2

-

Bits-1

ERAM

Bits-0

AO

ERAM:

Define if hide the expanded RAM, so to access to the external RAM

0:

= The internal auxiliary RAM access is enabled

1: =The internal auxiliary RAM access is disabled. The MOVX instructions always direct to external

RAM.

AO:

0:

= ALE is emitted at a constant rate of 1/6 the oscillator frequency for 12T mode, and at a constant rate

of 1/3 the oscillator frequency for 6T mode

1:

= ALE is active only during access to external memory for both MOVC and MOVX

SFR:

AUXR1

Bits-7

-

Bits-6

-

Bits-5

-

Bits-4

-

Bits-3

GF2

Bits-2

-

Bits-1

-

Bits-0

DPS

GF2:

General purpose flag

DPS:

Data pointer switch

0:

= Make the data pointer-0 active

1: = Make the data pointer-1 active

32

MPC89x51A Data Sheet

MEGAWIN