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SN8F2250B 参数 Datasheet PDF下载

SN8F2250B图片预览
型号: SN8F2250B
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-Bit Micro-Controller]
分类和应用: 微控制器
文件页数/大小: 133 页 / 1554 K
品牌: SONIX [ SONIX TECHNOLOGY COMPANY ]
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SN8F2250B Series  
USB 2.0 Full-Speed 8-Bit Micro-Controller  
11 Flash  
11.1 OVERVIEW  
The SN8F2250B series USB MCU integrated device feature in-system programmable (ISP) FLASH memory for  
convenient, upgradeable code storage. The FLASH memory may be programmed via the SONiX 8 bit MCU  
programming interface or by application code and USB interface for maximum flexibility. The SN8F2250B provides  
security options at the disposal of the designer to prevent unauthorized access to information stored in FLASH  
memory.  
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The MCU is stalled during Flash write (program) and erase operations, although peripherals (USB, Timers, WDT,  
I/O, PWM, etc.) remain active.  
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Interrupts will disable by firmware during a Flash write or erase operation.  
The Flash page containing the boot loader and code option (ROM address 0x2000 ~ 0x27FF) cannot be erased  
from application code when the code option’s security1 enable.  
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Watch dog timer should be clear before the Flash write or erase operation.  
The erase operation sets all the bits in the Flash page to logic 1.  
Hardware will hold system clock and automatically move out data from RAM and do programming, after  
programming finished, hardware will release system clock and let MCU execute the next instruction.(Recommend  
add two NOP instructions after this active).  
11.2 FLASH PROGRAMMING/ERASE CONTROL REGISTER  
0BAH  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
PECMD  
PECMD7  
PECMD6  
PECMD5  
PECMD4  
PECMD3  
PECMD2  
PECMD1  
PECMD0  
Read/Write  
After reset  
W
0
W
0
W
0
W
0
W
0
W
0
W
0
W
0
Bit [7:0] PECMD[7:0]: 0x5A: Page Program (32 words/page), 0xC3: Page Erase (128 words/page)  
SONiX TECHNOLOGY CO., LTD  
Page 115  
Version 1.1  
 
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