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Z8F012APB020SC 参数 Datasheet PDF下载

Z8F012APB020SC图片预览
型号: Z8F012APB020SC
PDF下载: 下载PDF文件 查看货源
内容描述: Z8喝采XP -R 4K系列高性能8位微控制器 [Z8 Encore XP-R 4K Series High-Performance 8-Bit Microcontrollers]
分类和应用: 微控制器外围集成电路光电二极管时钟
文件页数/大小: 276 页 / 3422 K
品牌: ZILOG [ ZILOG, INC. ]
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Z8 Encore! XP® 4K Series  
Product Specification  
149  
Option Bit Types  
User Option Bits  
The user option bits are contained in the first two bytes of program memory. User access  
to these bits has been provided because these locations contain application-specific device  
configurations. The information contained here is lost when page 0 of the program mem-  
ory is erased.  
Trim Option Bits  
The trim option bits are contained in the information page of the Flash memory. These bits  
are factory programmed values required to optimize the operation of onboard analog cir-  
cuitry and cannot be permanently altered by the user. Program memory may be erased  
without endangering these values. It is possible to alter working values of these bits by  
accessing the Trim Bit Address and Data Registers, but these working values are lost after  
a power loss or any other reset event.  
There are 32 bytes of trim data. To modify one of these values the user code must first  
write a value between 00Hand 1FHinto the Trim Bit Address Register. The next write to  
the Trim Bit Data register changes the working value of the target trim data byte.  
Reading the trim data requires the user code to write a value between 00Hand 1FHinto the  
Trim Bit Address Register. The next read from the Trim Bit Data register returns the work-  
ing value of the target trim data byte.  
The trim address range is from information address 20-3F only. The remainder of the  
information page is not accessible through the trim bit address and data registers.  
Note:  
Calibration Option Bits  
The calibration option bits are also contained in the information page. These bits are fac-  
tory programmed values intended for use in software correcting the device’s analog per-  
formance. To read these values, the user code must employ the LDC instruction to access  
the information area of the address space as defined in See Flash Information Area on  
page 15.  
Serialization Bits  
As an optional feature, ZiLOG is able to provide factory-programmed serialization. For  
serialized products, the individual devices will be programmed with unique serial num-  
bers. These serial numbers are binary values, four bytes in length. The numbers increase in  
size with each device, but gaps in the serial sequence may exist.  
These serial numbers are stored in the flash information page (see Reading the Flash Infor-  
mation Page on page 150 and Serialization Data on page 159 for more details) and are  
unaffected by mass erasure of the device's flash memory.  
PS022815-0206  
Flash Option Bits