mpc89x51a Megawin Technology, mpc89x51a Datasheet - Page 33

Manufacturer Part Number

mpc89x51a

Description

8-bit Micro-controller

Manufacturer

Megawin Technology

Datasheet

1.MPC89X51A.pdf (39 pages)

Note for Other SFR

SFR: AUXR

SFR: AUXR1

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

AO: 0: = ALE is emitted at a constant rate of 1/6 the oscillator frequency for 12T mode, and at a constant

GF2: General purpose flag

DPS: Data pointer switch

MEGAWIN

Bits-7

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

0: = Make the data pointer-0 active

1: = Make the data pointer-1 active

0: = The internal auxiliary RAM access is enabled

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

rate of 1/3 the oscillator frequency for 6T mode

external RAM.

Bits-6

Bits-5

MPC89x51A Data Sheet

Bits-4

Bits-3

GF2

Bits-2

ERAM

Bits-1

Bits-0

DPS