Note for Other SFR

SFR: AUXR

Bit-7

Bit-6

Bit-5

Bit-4

Bit-3

Bit-2

Bit-1

Bit-0

-

-

-

-

-

-

ERAM

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

Bit-7

Bit-6

Bit-5

Bit-4

Bit-3

Bit-2

Bit-1

Bit-0

-

-

-

-

GF2

-

-

DPS

GF2: General purpose flag

DPS: Data pointer switch

0: = Make the data pointer-0 active

1: = Make the data pointer-1 active

32

MPC89x53A Data Sheet

MEGAWIN