T83C5101XXX-TDRIL Ver la hoja de datos (PDF) - Atmel Corporation

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T83C5101XXX-TDRIL

8-bit Low Pin Count Microcontrollers

Atmel Corporation 

T8xC5101/02

Reduced EMI Mode

As there is no Port 0 nor Port 2 outputted from this device, there is no need to output

ALE. EMI are then reduced intrinsically.

The bit which controls ALE disabling in Rx devices is A0 (bit 0) in register AUXR. As

explained earlier for bit EXTRAM, writing any value to AO will have no effect on the

device behavior.

Table 16. AUXR Register

AUXR - Auxiliary Register (8Eh)

7

6

5

4

3

2

1

0

-

-

-

-

-

-

EXTRAM

AO

Bit

Bit Number Mnemonic Description

7

-

Reserved

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

6

-

Reserved

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

5

-

Reserved

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

4

-

Reserved

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

3

-

Reserved

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

2

-

Reserved

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

EXTRAM bit

1

EXTRAM Writing to this bit will have no effect. The value read from this bit is

indeterminate.

ALE Output bit

0

AO

Writing to this bit will have no effect. The value read from this bit is

indeterminate.

Reset Value = XXXX XX00b

Not bit addressable

31

4233H–8051–02/08

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