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型號：	M32185F4VFP
元件分類：	微控制器/微處理器
英文描述：	32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP144
封裝：	20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144
文件頁數(shù)：	1027/1032頁
文件大?。?/td>	5750K
代理商：	M32185F4VFP

SUMMARY OF PRECAUTIONS

Appendix 4

Appendix 4-4

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

Appendix 4.5 Notes on Internal Flash Memory

The following describes precautions to be taken when programming/erasing the internal flash memory.

When the internal flash memory is programmed or erased, a high voltage is generated internally. Because mode

transitions during programming/erase operation may cause the chip to break down, make sure the mode setting/

reset pin and power supply voltages do not fluctuate to prevent unintended changes of modes.

If the system uses any pins that are to be used by a general-purpose programming/erase tool, care must be taken

to prevent adverse effects on the system when the tool is connected.

If the internal flash memory needs to be protected while using a general-purpose programming/erase tool, set any

ID in the flash memory protect ID verification area (H’0000 0084 to H’0000 008F).

If the internal flash memory does not need to be protected while using a general-purpose programming/erase tool,

fill the entire flash memory protect ID verification area (H’0000 0084 to H’0000 008F) with H’FF.

If the Flash Status Register (FSTAT)’s each error status is to be cleared (initialized to H’80) by resetting the Flash

Control Register 4 (FCNT4) FRESET bit, check to see that the Flash Status Register (FSTAT) FBUSY bit = "1"

(ready) before clearing the error status.

Before resetting the Flash Control Register 1 (FCNT1) FENTRY bit from "1" to "0," check to see that the Flash

Status Register (FSTAT) FBUSY bit = "1" (ready).

Do not clear the FENTRY bit if the Flash Control Register 1 (FCNT1) FENTRY bit = "1" and the Flash Status

When programming/erasing via JTAG, the flash memory can be programmed or erased regardless of the pin state

because the FP pin is controlled internally within the chip.

Appendix 4.6 Things to Be Considered upon Exiting Reset

Input/output ports

When exiting reset, the microcomputer’s input/output ports are disabled against input in order to prevent shoot-

through current. To use any ports in input mode, set the Port Input Special Function Control Register (PICNT)

PIEN0 bit to enable them for input. For details, see Section 8.3, “Input/Output Port Related Registers.”

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