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W78E858
5.17 F04KBOOT Mode (Boot From 4K Bytes LDROM)
The W78E858 boots from APROM program (32K bytes bank) by default after chip reset. On some
occasions, user can force the W78E858 to boot from the LDROM program (4K bank) after chip reset.
The setting for this special mode is as follow.
5.17.1 F04KBOOT Mode
RST
P4.3
P2.7
P2.6
MODE
H
↓
X
L
FO4KBOOT
H
↓
L
X
FO4KBOOT
Note: In application system design, user must take care the P2, P3, ALE,
EA and PSEN pin status at reset to avoid
W78E858 entering the programming mode or F04KBOOT mode in normal operation.
Enter 4K Reboot M ode Tim ing
Ts=1us
Th > 24 clocks
P2.6
P2.7
X
RESET
5.18 Security
During the on-chip FLASH EPROM programming mode, the FLASH EPROM can be programmed and
verified repeatedly. Until the code inside the FLASH EPROM is confirmed OK, the code can be
protected. The protection of FLASH EPROM and those operations on it are described below:
The W78E858 has several special setting registers in FLASH EPROM block. Those bits of the security
register can’t be changed once they have been programmed from high to low. They can only be reset
through erase-all operation. The security register is located at the FFFFH on the same bank with 4K
LDROM i.e., P3.6 must set high at writer mode.
Publication Release Date: April 22, 2008
- 21 -
Revision A8
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| W78ERD2 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W78ERD2_07 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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| W78ERD2A40DL | 功能描述:IC MCU 8-BIT 64K FLASH 40-DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W78 標準包裝:300 系列:78K0R/Ix3 核心處理器:78K/0R 芯體尺寸:16-位 速度:40MHz 連通性:3 線 SIO，I²C，LIN，UART/USART 外圍設備:DMA，LVD，POR，PWM，WDT 輸入/輸出數(shù):27 程序存儲器容量:16KB（16K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 8x10b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:38-SSOP 包裝:托盤 |
| W78ERD2A40DN | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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