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68HC705JJ7_1 参数 Datasheet PDF下载

68HC705JJ7_1图片预览
型号: 68HC705JJ7_1
PDF下载: 下载PDF文件 查看货源
内容描述: 常规版本规格 [General Release Specification]
分类和应用:
文件页数/大小: 230 页 / 5548 K
品牌: FREESCALE [ Freescale ]
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Freescale Semiconductor, Inc.  
Memory  
EPROM  
2.7 EPROM  
The EPROM is located in two areas of the memory map:  
• Addresses $0700–$1EFF contain 6144 bytes of user EPROM.  
• Addresses $1FF0–$1FFF contain 16 bytes of EPROM reserved  
for user vectors and COP and security register, and the mask  
option register.  
2.8 COP Re g iste r  
As shown in Figure 2-6, a register location is provided at $1FF0 to set  
1
the EPROM security , select the optional features, and reset the COP  
watchdog timer. The OPT bit controls the function of the PB4 port pin  
and the availability to add an offset to any measured analog voltages.  
See 8.5 Analog Status Register for more information  
$1FF0  
Read:  
Write:  
Bit 7  
6
5
4
3
2
1
Bit 0  
EPMSEC  
OPT  
COPC  
= Unimplemented  
Figure 2-6. COP and Security Register (COPR)  
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or  
copying the EPROM/OTPROM difficult for unauthorized users.  
MC68HC705JJ7/MC68HC705JP7 Rev. 3.0  
General Release Specification  
Memory  
For More Information On This Product,  
Go to: www.freescale.com  
 
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