參數(shù)資料
型號： MB91F469TAPMC-GSE2
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 100 MHz, RISC MICROCONTROLLER, PQFP144
封裝： 20 X 20 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, PLASTIC, LQFP-144
文件頁數(shù)： 85/140頁
文件大?。?/td> 4819K
代理商： MB91F469TAPMC-GSE2
MB91460T Series
DS705-00001-2v1-E
49
7.
Notes About Flash Memory CRC Calculation
The Flash Security macro contains a feature to calculate the 32-bit checksum over addresses located in the Flash
Memory address space. This feature is described in the MB91460 Series Hardware Manual, chapter 55.4.1 “Flash
Security Control Register”.
Additional notes are given here:
The CRC calculation runs on the internal RC clock. It is recommended to switch the RC clock frequency to 2 MHz
for shortening the calculation time. However, the CPU clock (CLKB) must be faster then RC clock, otherwise the
CRC calculation may not start correctly.
■ MEMORY SPACE
The FR family has 4 Gbytes of logical address space (232 addresses) available to the CPU by linear access.
Direct addressing area
The following address space area is used for I/O.
This area is called direct addressing area, and the address of an operand can be specified directly in an
instruction.
The size of directly addressable area depends on the length of the data being accessed as shown below.
Byte data access : 000H to 0FFH
Half word access : 000H to 1FFH
Word data access : 000H to 3FFH
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