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型號(hào)：	MQ80C52CXXX-25P883R
廠商：	TEMIC SEMICONDUCTORS
元件分類(lèi)：	微控制器/微處理器
英文描述：	8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44
文件頁(yè)數(shù)：	687/849頁(yè)
文件大小：	12530K
代理商：	MQ80C52CXXX-25P883R

32099I–01/2012

AT32UC3L016/32/64

SAB Security Restrictions

The Service Access bus can be restricted by internal security measures. A short description of

the security measures are found in the table below.

Security measure and control location

A security measure is a mechanism to either block or allow SAB access to a certain address or

address range. A security measure is enabled or disabled by one or several control signals. This

is called the control location for the security measure.

These security measures can be used to prevent an end user from reading out the code pro-

grammed in the flash, for instance.

Below follows a more in depth description of what locations are accessible when the security

measures are active.

1. Second Word of the User Page, refer to the Fuses Settings section for details.

Alternative mapping for HSB space, for compatibility with

other 32-bit AVR devices.

Memory Service

Memory Service Unit registers

Table 31-1.

SAB Slaves, Addresses and Descriptions

Address [35:32]

Description

Table 31-2.

SAB Security Measures

Security Measure

Control Location

Description

SECURE bits set

Allocates a portion of the flash for secure code. This code

cannot be read or debugged. The User page is also locked.

Security bit

security bit set

Programming and debugging not possible, very restricted

UPROT + security

Restricts all access except parts of the flash and the flash

controller for programming user code. Debugging is not

possible unless an OS running from the secure part of the

flash supports it.

Table 31-3.

Secure Mode SAB Restrictions

Address Start

Address End

Secure flash area

0x580000000 +

(USERPAGE[15:0] << 10)

Secure RAM area

0x500000000 +

(USERPAGE[31:16] << 10)

Other accesses

相關(guān)PDF資料	PDF描述
MQ80C52CXXX-25P883R	8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQFP44
MQ80C154-16P883D	8-BIT, 16 MHz, MICROCONTROLLER, CQFP44
R83C154DXXX-20D	8-BIT, MROM, 20 MHz, MICROCONTROLLER, CQCC44
R80C52EXXX-16D	8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQCC44
IF8680A	8-BIT, 8 MHz, MICROCONTROLLER, PQFP160

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
MQ82370-20	制造商:Rochester Electronics LLC 功能描述:- Bulk
MQ8238020	制造商:Intel 功能描述:CONTROLLER: OTHER
MQ82380-20	制造商:Rochester Electronics LLC 功能描述:- Bulk
MQ82380-20/R	制造商:Rochester Electronics LLC 功能描述:
MQ82592	制造商:Rochester Electronics LLC 功能描述:- Bulk

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