T87C5101-ICUCV Просмотр технического описания (PDF) - Atmel Corporation

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T87C5101-ICUCV

8-bit Low Pin Count Microcontrollers

Atmel Corporation 

Figure 4. Internal and External Data Memory Address

FF

FF

XRAM

256 bytes

Upper

128 bytes

Internal

Ram

indirect accesses

80

FF

Special

Function

Register

direct accesses

80

Lower

128 bytes

Internal

Ram

direct or indirect

accesses

00

00

Table 4. Auxiliary Register - AUXR

AUXR

Address 08EH

-

-

-

-

-

- EXTRAM AO

Reset value

X

X

X

X

X

X

0

0

Symbol Function

-

Not implemented, reserved for future use. (1)

AO

Writing to this bit will have no effect (refer to chapter "Reduced EMI mode")

EXTRAM Writing to this bit will have no effect

1.

User software should not write 1s to reserved bits. These bits may be used in future 8051

family products to invoke new features. In that case, the reset or inactive value of the

new bit will be 0, and its active value will be 1. The value read from a reserved bit is

indeterminate.

13 T8xC5101/02

4233H–8051–02/08

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