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Z8F012APB020SC 参数 Datasheet PDF下载

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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  
147  
SPROT7-SPROT0—Sector Protection  
Each bit corresponds to a 512 byte Flash sector. For the Z8F04xx devices all bits are used.  
For the Z8F02xx devices, the upper 4 bits are unused. For the Z8F01xx devices, the upper  
6 bits are unused.  
Flash Frequency High and Low Byte Registers  
The Flash Frequency High (FFREQH) and Low Byte (FFREQL) registers combine to  
form a 16-bit value, FFREQ, to control timing for Flash program and erase operations.  
The 16-bit binary Flash Frequency value must contain the system clock frequency (in  
KHz) and is calculated using the following equation:.  
System Clock Frequency  
FFREQ[15:0] = {FFREQH[7:0],FFREQL[7:0]} = ---------------------------------------------------------------  
1000  
The Flash Frequency High and Low Byte registers must be loaded with the correct value  
to ensure proper operation of the device. Also, Flash programming and erasure is not  
supported for system clock frequencies below 20 KHz or above 20 MHz.  
Caution:  
Table 85. Flash Frequency High Byte Register (FFREQH)  
BITS  
7
6
5
4
3
2
1
0
FFREQH  
FIELD  
RESET  
R/W  
0
0
0
0
0
0
0
0
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
R/W  
FFAH  
ADDR  
FFREQH—Flash Frequency High Byte  
High byte of the 16-bit Flash Frequency value.  
Table 86. Flash Frequency Low Byte Register (FFREQL)  
BITS  
7
6
5
4
3
2
1
0
FFREQL  
0
FIELD  
RESET  
R/W  
R/W  
FFBH  
ADDR  
FFREQL—Flash Frequency Low Byte  
Low byte of the 16-bit Flash Frequency value.  
PS022815-0206  
Flash Memory