參數(shù)資料
型號： ATWEBDVK-02RC
廠商： Atmel
文件頁數(shù)： 133/137頁
文件大?。?/td> 0K
描述： KIT DEV TCP/IP AT89C51RD2 REMOTE
標(biāo)準(zhǔn)包裝： 1
系列： @Web
主要目的： *
嵌入式： *
已用 IC / 零件： AT89C51RD2
主要屬性： *
次要屬性： *
已供物品： 板，帶遠(yuǎn)程控制器模塊和軟件
產(chǎn)品目錄頁面： 617 (CN2011-ZH PDF)
95
4235K–8051–05/08
AT89C51RD2/ED2
Table 24-2.
Program Lock Bits
Note:
U: Unprogrammed or "one" level.
P: Programmed or "zero" level.
X: Do not care
WARNING: Security level 2 and 3 should only be programmed after Flash and code verification.
These security bits protect the code access through the parallel programming interface. They
are set by default to level 4. The code access through the ISP is still possible and is controlled
by the "software security bits" which are stored in the extra Flash memory accessed by the ISP
firmware.
To load a new application with the parallel programmer, a chip erase must first be done. This will
set the HSB in its inactive state and will erase the Flash memory. The part reference can always
be read using Flash parallel programming modes.
24.3.3
Default Values
The default value of the HSB provides parts ready to be programmed with ISP:
BLJB: Programmed force ISP operation.
X2: Unprogrammed to force X1 mode (Standard Mode).
XRAM: Unprogrammed to valid XRAM
LB2-0: Security level four to protect the code from a parallel access with maximum security.
24.3.4
Software Registers
Several registers are used in factory and by parallel programmers. These values are used by
Atmel ISP.
These registers are in the "Extra Flash Memory" part of the Flash memory. This block is also
called "XAF" or eXtra Array Flash. They are accessed in the following ways:
Commands issued by the parallel memory programmer.
Commands issued by the ISP software.
Calls of API issued by the application software.
Several software registers are described in Table 24-3.
Table 24-3.
Default Values
Program Lock Bits
Protection Description
Security
Level
LB0
LB1
LB2
1
U
No program lock features enabled.
2
P
U
MOVC instruction executed from external program memory is disabled from
fetching code bytes from internal memory, EA is sampled and latched on reset,
and further parallel programming of the on chip code memory is disabled.
ISP and software programming with API are still allowed.
3
X
P
U
Same as 2, also verify code memory through parallel programming interface is
disabled.
4
X
P
Same as 3, also external execution is disabled (Default).
Mnemonic
Definition
Default value
Description
SBV
Software Boot Vector
FCh
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ATWEBDVK-02VOIP 功能描述:KIT DEV TCP/IP AT89C51RD2 VOIP RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:@Web 標(biāo)準(zhǔn)包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源
ATWEBDVK-02WC 功能描述:KIT DEV TCP/IP AT89C51RD2 WEBCAM RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:@Web 標(biāo)準(zhǔn)包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源
ATWEBEVK-01 功能描述:KIT EVAL TCP/IP AT89C51AC2 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:@Web 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電源管理，電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板
ATWEBEVK-02 功能描述:KIT SOFTWARE EVAL FOR T89C51CC01 制造商:microchip technology 系列:- 零件狀態(tài):停產(chǎn) 主要用途:接口，以太網(wǎng) 嵌入式:- 使用的 IC/零件:- 主要屬性:- 輔助屬性:- 所含物品:板 標(biāo)準(zhǔn)包裝:1
ATWEBEVK-05 功能描述:KIT EVAL MODULE RS232 TO TCP/IP RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:@Web 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電源管理，電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板
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