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T89C5115-RATIM Folha de dados(PDF) 48 Page - ATMEL Corporation

Nome de Peças T89C5115-RATIM
Descrição Electrónicos  Low Pin Countl 8-bit Microcontroller with A/D Converter and 16 KBytes Flash Memory
PDF  113 Pages
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Fabricante Electrônico  ATMEL [ATMEL Corporation]
Página de início  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T89C5115-RATIM Folha de dados(HTML) 48 Page - ATMEL Corporation

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AT89C5115
4128F–8051–05/06
Hardware Security Byte
Table 31. Hardware Security byte
After erasing the chip in parallel mode, the default value is : FFh
The erasing in ISP mode (from bootloader) does not modify this byte.
Notes:
1. Only the 4 MSB bits can be accessed by software.
2. The 4 LSB bits can only be accessed by parallel mode.
76
54
32
1
0
X2B
BLJB
-
-
-
LB2
LB1
LB0
Bit
Number
Bit
Mnemonic
Description
7X2B
X2 bit
Set this bit to start in standard mode
Clear this bit to start in X2 Mode.
6BLJB
Boot Loader Jump bit
- 1: To start the user’s application on next RESET (@0000h) located in FM0,
- 0: To start the boot loader(@F800h) located in FM1.
5 - 3
-
Reserved
The value read from these bits are indeterminate.
2 - 0
LB2:0
Lock bits (see Table 22)



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