Note for Other SFR
SFR: AUXR
Bits-7
Bits-6
Bits-5
Bits-4
Bits-3
Bits-2
Bits-1
Bits-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
Bits-7
Bits-6
Bits-5
Bits-4
Bits-3
Bits-2
Bits-1
Bits-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
MPC89x51A Data Sheet
MEGAWIN
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