參數(shù)資料
型號(hào)： PSD413A2V-A-20JI
廠商： 意法半導(dǎo)體
英文描述： Flash In-System Programmable ISP Peripherals For 8-bit MCUs
中文描述： Flash在系統(tǒng)可編程ISP的外設(shè)的8位微控制器
文件頁數(shù)： 32/120頁
文件大?。?/td> 563K
代理商： PSD413A2V-A-20JI
PSD813F1-A
Preliminary
28
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Sec7_Prot
Sec6_Prot
Sec5_Prot
Sec4_Prot
Sec3_Prot
Sec2_Prot
Sec1_Prot Sec0_Prot
Flash Protection Register
9.1.1.9.2 Reset Instruction
The Reset instruction resets the internal memory logic state machine in a few milliseconds.
Reset is an instruction of either one write operation or three write operations (refer to
Table 9).
Bit Definitions:
Sec<i>_Prot
Sec<i>_Prot
PSD/EE Protection Register
1 = Flash <i> is write protected.
0 = Flash <i> is not write protected.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Security_
Bit
*
*
*
Sec3_Prot
Sec2_Prot
Sec1_Prot Sec0_Prot
Bit Definitions:
Sec<i>_Prot
Sec<i>_Prot
Security_Bit
1 = EEPROM Boot Sector <i> is write protected.
0 = EEPROM Boot Sector <i> is not write protected.
0 = Security Bit in device has not been set.
1 = Security Bit in device has been set.
Table 11. Sector Protection/Security Bit Definition
*:
Not used.
The
PSD813F1
Functional
Blocks
(cont.)
9.1.1.8.4 Flash Erase Resume Instruction
If an Erase Suspend instruction was previously executed, the erase operation may be
resumed by this instruction. The Erase Resume instruction consists of writing 030h to any
address while an appropriate Chip Select (FSi) is true. (See Table 9.)
9.1.1.9 Flash and EEPROM Memory Specific Features
9.1.1.9.1 Flash and EEPROM Sector Protect
Each Flash and EEPROM sector can be separately protected against Program and Erase
functions. Sector Protection provides additional data security because it disables all
program or erase operations. This mode can be activated through the JTAG Port or a
Device Programmer.
Sector protection can be selected for each sector using the PSDsoft Configuration program.
This will automatically protect selected sectors when the device is programmed through
the JTAG Port or a Device Programmer. Flash and EEPROM sectors can be
unprotected to allow updating of their contents using the JTAG Port or a Device
Programmer. The microcontroller can read (but cannot change) the sector protection bits.
Any attempt to program or erase a protected Flash or EEPROM sector will be ignored by
the device. The Verify operation will result in a read of the protected data. This allows a
guarantee of the retention of the Protection status.
The sector protection status can be read by the MCU through the Flash protection and
PSD/EE protection registers (CSIOP). See Table 11.
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