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AT89C5122DS-RDRUM 데이터시트(PDF) 23 Page - ATMEL Corporation

부품명 AT89C5122DS-RDRUM
상세설명  C51 Microcontroller with USB and Smart Card Reader Interfaces
PDF  208 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5122DS-RDRUM 데이터시트(HTML) 23 Page - ATMEL Corporation

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23
AT83R5122, AT8xC5122/23
4202F–SCR–07/2008
Table 6.
Auxiliary Register 1 AUXR1- (0A2h) for AT8xC5122
Reset Value = XX1X XX0X0b (Not bit addressable)
Table 7.
Auxiliary Register 1 AUXR1- (0A2h) for AT83C5123
Reset Value = XXXX XX0X0b (Not bit addressable)
7
6
5
4
3
2
1
0
--
ENBOOT
-
GF3
0
-
DPS
Bit
Number
Bit
Mnemonic
Description
7 - 6
-
Reserved
The value read from this bit is indeterminate. Do not change these bits.
5ENBOOT
Enable Boot ROM (CRAM / E2PROM version only)
Set this bit to map the Boot ROM from 8000h to FFFFh. If the PC increments
beyond 7FFFh address, the code is fetch from internal ROM
Clear this bit to disable Boot ROM. If the PC increments beyond 7FFFh address,
the code is fetch from external code memory (C51 standard roll over function)
This bit is forced to 1 at reset
4-
Reserved
The value read from this bit is indeterminate. Do not change this bit.
3
GF3
This bit is a general-purpose user flag.
2
0
Always cleared.
1-
Reserved
The value read from this bit is indeterminate. Do not change this bit.
0DPS
Data Pointer Selection
Cleared to select DPTR0. Set to select DPTR1.
7
6
5
4
3
2
1
0
----
GF3
0
-
DPS
Bit
Number
Bit
Mnemonic
Description
7 - 6
-
Reserved
The value read from this bit is indeterminate. Do not change these bits.
5
Reserved
The value read from this bit is indeterminate. Do not change these bits.
4-
Reserved
The value read from this bit is indeterminate. Do not change this bit.
3
GF3
This bit is a general-purpose user flag.
2
0
Always cleared.
1-
Reserved
The value read from this bit is indeterminate. Do not change this bit.
0DPS
Data Pointer Selection
Cleared to select DPTR0.
Set to select DPTR1.



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