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參數資料
| 型號： | W77E58-25 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8 BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, FLASH, 25 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數： | 74/85頁 |
| 文件大?。?/td> | 570K |
| 代理商： | W77E58-25 |
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Preliminary W77E58
- 74 -
SECURITY BITS
During the on-chip MTP ROM operation mode, the MTP ROM can be programmed and verified
repeatedly. Until the code inside the MTP ROM is confirmed OK, the code can be protected. The
protection of MTP ROM and those operations on it are described below.
The W77E58 has several Special Setting Registers, including the Security Register and
Company/Device ID Registers, which can not be accessed in normal mode. These registers can only
be accessed from the MTP ROM operation mode. Those bits of the Security Registers can not be
changed once they have been programmed from high to low. They can only be reset through erase-
all operation. The contents of the Company ID and Device ID registers have been set in factory. Both
registers are addressed by the A0 address line during the same specific condition.
The Security Register is addressed in the MTP-ROM operation mode by address #0FFFFh.
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 : Seed 0 & 1 access inhibit
Default 1 for each bit.
Special Setting Registers
Company ID (#DAH)
D7 D6 D5 D4 D3 D2 D1 D0
1
1
0
1
1
0
1
0
Device ID (#62H)
0
1
1
1
0
0
0
Security Bits
0
32KB MTP ROM
Program Memory
Reserved
Security Register
0FFFFh
0000h
7FFFh
Seed 1
Seed 0
0FF7Fh
0FF3Fh
Reserved
On-Chip
B2
相關PDF資料 |
PDF描述 |
|---|---|
| W77E58-40 | 8 BIT MICROCONTROLLER |
| W77E58F-25 | 8 BIT MICROCONTROLLER |
| W77E58F-40 | 8 BIT MICROCONTROLLER |
| W77E58P-25 | 8 BIT MICROCONTROLLER |
| W77E58P-40 | 8 BIT MICROCONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W77E58-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58F-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58F-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58P-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58P-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
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