參數(shù)資料
型號(hào): ADUC7032BSTZ-88
廠商: Analog Devices Inc
文件頁數(shù): 45/120頁
文件大?。?/td> 0K
描述: IC MCU 96K FLASH DUAL 48LQFP
標(biāo)準(zhǔn)包裝: 1
系列: MicroConverter® ADuC7xxx
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 20.48MHz
連通性: LIN,SPI,UART/USART
外圍設(shè)備: POR,PSM,溫度傳感器,WDT
輸入/輸出數(shù): 9
程序存儲(chǔ)器容量: 96KB(48K x 16)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 1.5K x 32
電壓 - 電源 (Vcc/Vdd): 3.5 V ~ 18 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 2x16b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 105°C
封裝/外殼: 48-LQFP
包裝: 托盤
ADuC7032-8L
Rev. A | Page 30 of 120
In summary, there are three levels of memory protection:
Temporary protection can be set and removed by writing
directly into the FEExHID MMR. This register is volatile;
therefore, protection is in place only while the part remains
powered on. Protection is not reloaded after a power cycle.
Keyed permanent protection can be set via FEExPRO,
which is used to lock the protection configuration. The
software key used at the start of the required FEExPRO
write sequence is saved once and must subsequently be
used for any subsequent access to the FEExHID or
FEExPRO MMRs. A mass erase sets the key back to
0xFFFF but also erases the entire user code space.
Permanent protection can be set via FEExPRO, similarly to
keyed permanent protection. The only difference is that
the software key used is 0xDEADDEAD. Once the
FEExPRO write sequence is saved, only a mass erase sets
the key back to 0xFFFFFFFF. This mass erase also erases
the entire user code space.
Sequence to Write the Key and Set Permanent Protection
1.
Write in FEExPRO corresponding to the pages to be
protected.
2.
Write the new (user-defined) 32-bit key in FEExADR
Bits[31:16] and FEExDAT Bits[15:0].
3.
Write 1,0 in FEExMOD Bits[6:5] and set FEExMOD Bit 3.
4.
Run the write key command 0x0C in FEExCON.
Sequence Example
The sequence to write the key and set permanent protection is illustrated in the following example, which protects writing Page 4 and Page 5
of the Flash/EE:
FEExPRO = 0xFFFFFFFB;
// Protect Page 4 and Page 5
FEExADR = 0x66BB;
// 32-bit key value Bits[31:16]
FEExDAT = 0xAA55;
// 32-bit key value Bits[15:0]
FEExMOD = 0x0048;
// Lock security sequence
FEExCON = 0x0C;
// Write key command
while (FEExSTA & 0x04){}
// Wait for command to finish
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