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AT85C5122D-RDRUM Folha de dados(PDF) 22 Page - ATMEL Corporation

Nome de Peças AT85C5122D-RDRUM
Descrição Electrónicos  C51 Microcontroller with USB and Smart Card Reader Interfaces
PDF  208 Pages
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Fabricante Electrônico  ATMEL [ATMEL Corporation]
Página de início  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT85C5122D-RDRUM Folha de dados(HTML) 22 Page - ATMEL Corporation

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AT83R5122, AT8xC5122/23
4202F–SCR–07/2008
Registers
Reset Value = 0XXX X000b
Table 5.
Auxiliary Register - AUXR (8Eh)
7654
3210
DPU
-
-
-
XRS0
EXTRAM
AO
Bit
Number
Bit
Mnemonic
Description
7DPU
Disable weak Pull-up
0
weak pull-up is enabled
1
weak pull-up is disabled
6-3
-
Reserved
The value read from this bit is indeterminate. Do not change these bits.
2XRS0
XRAM Size
0
256 bytes (default)
1
512 bytes
1EXTRAM
EXTRAM bit
Cleared to access internal XRAM using MOVX @ Ri/ @ DPTR.
Set to access external memory.
Programmed by hardware after Power-up regarding Hardware Security Byte
(HSB), default setting , XRAM selected.
0AO
ALE Output bit
Cleared , ALE is emitted at a constant rate of 1/6 the oscillator frequency (or 1/3 if
X2 mode is used)(default).
Set , ALE is active only when a MOVX or MOVC instruction is used.



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