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參數(shù)資料
| 型號： | W78E52-33 |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 11/22頁 |
| 文件大?。?/td> | 306K |
| 代理商： | W78E52-33 |
Preliminary W78E52B
Publication Release Date: December 1998
- 11 -
Revision A1
B0
B1
B0 : Lock bit, logic 0 : active
B1 : MOVC inhibit,
logic 0 : the MOVC instruction in external memory
cannot access the code in internal memory.
logic 1 : no restriction.
B2 : Encryption
logic 0 : the encryption logic enable
logic 1 : the encryption logic disable
Default 1 for all security bits.
Special Setting Registers
Company ID (#DAH)
D7 D6 D5 D4 D3 D2 D1 D0
1
1
0
1
1
0
1
0
Device ID (#E0H)
1
1
1
0
0
0
0
Security Bits
0
8KB MTP ROM
Program Memory
Reserved
0FFFFh
0000h
1FFFh
Reserved
B2
Reserved bits must be kept in logic 1.
B7
B7 : Osillator Control
logic 0 : 1/2 gain
logic 1 : Full gain
Lock bit
This bit is used to protect the customer's program code in the W78E52B. It may be set after the
programmer finishes the programming and verifies sequence. Once this bit is set to logic 0, both the
MTP ROM data and Special Setting Registers can not be accessed again.
MOVC Inhibit
This bit is used to restrict the accessible region of the MOVC instruction. It can prevent the MOVC
instruction in external program memory from reading the internal program code. When this bit is set
to logic 0, a MOVC instruction in external program memory space will be able to access code only in
the external memory, not in the internal memory. A MOVC instruction in internal program memory
space will always be able to access the ROM data in both internal and external memory. If this bit is
logic 1, there are no restrictions on the MOVC instruction.
Encryption
This bit is used to enable/disable the encryption logic for code protection. Once encryption feature is
enabled, the data presented on port 0 will be encoded via encryption logic. Only whole chip erase will
reset this bit.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W78E52-40 | 8-BIT MICROCONTROLLER |
| W78E52P-16 | 8-BIT MICROCONTROLLER |
| W78E52P-24 | 8-BIT MICROCONTROLLER |
| W78E52P-33 | 8-BIT MICROCONTROLLER |
| W78E52P-40 | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W78E52-40 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| W78E52B | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MTP MICROCONTROLLER |
| W78E52B-24 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MTP MICROCONTROLLER |
| W78E52B-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MTP MICROCONTROLLER |
| W78E52BF-24 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MTP MICROCONTROLLER |
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