欢迎访问ic37.com |
会员登录 免费注册
发布采购

W78E365A40DL 参数 Datasheet PDF下载

W78E365A40DL图片预览
型号: W78E365A40DL
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-BIT MICROCONTROLLER]
分类和应用: 微控制器和处理器外围集成电路光电二极管时钟
文件页数/大小: 43 页 / 420 K
品牌: WINBOND [ WINBOND ]
 浏览型号W78E365A40DL的Datasheet PDF文件第18页浏览型号W78E365A40DL的Datasheet PDF文件第19页浏览型号W78E365A40DL的Datasheet PDF文件第20页浏览型号W78E365A40DL的Datasheet PDF文件第21页浏览型号W78E365A40DL的Datasheet PDF文件第23页浏览型号W78E365A40DL的Datasheet PDF文件第24页浏览型号W78E365A40DL的Datasheet PDF文件第25页浏览型号W78E365A40DL的Datasheet PDF文件第26页  
W78E365/W78E365A  
6.11 H/W Reboot Mode (Boot from LDROM)  
By default, the W78E365 boots from APROM program after a power on reset. On some occasions,  
user can force the W78E365 to boot from the LDROM program via following settings. The possible  
situation that you need to enter H/W REBOOT mode when the APROM program can not run properly  
and device can not jump back to LDROM to execute in-system programming function. Then you can  
use this H/W REBOOT mode to force the W78E365 jumps to LDROM and executes in-system  
programming procedure. When you design your system, you may reserve the pins P2.6, P2.7 to  
switches or jumpers. For example in a CD-ROM system, you can connect the P2.6 and P2.7 to PLAY  
and EJECT buttons on the panel. When the APROM program fails to execute the normal application  
program. User can press both two buttons at the same time and then turn on the power of the  
personal computer to force the W78E365 to enter the H/W REBOOT mode. After power on of  
personal computer, you can release both buttons and finish the in-system programming procedure to  
update the APROM code. In application system design, user must take care of the P2, P3, ALE, EA  
and PSEN pin value at reset to prevent from accidentally activating the programming mode or H/W  
REBOOT mode. It is necessary to add 10K resistor on these P2.6, P2.7 and P4.3 pins.  
H/W Reboot Mode  
P4.3  
X
P2.7  
L
P2.6  
L
MODE  
REBOOT  
REBOOT  
L
X
X
The Reset Timing For Entering  
F04KBOOT Mode  
P2.7  
Hi-Z  
Hi-Z  
P2.6  
RST  
30 mS  
10 mS  
- 22 -