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型號(hào)：	HD6433394F16
元件分類：	微控制器/微處理器
英文描述：	MROM, 16 MHz, MICROCONTROLLER, PQFP80
封裝：	QFP-80
文件頁(yè)數(shù)：	422/745頁(yè)
文件大?。?/td>	2613K
代理商：	HD6433394F16

User Programming Mode Execution Procedure (Example)*: Figure 20.7 shows the execution

procedure for user programming mode when the on-board update routine is executed in RAM.

Note: * Do not apply 12 V to the FV

PP pin during normal operation. To prevent flash memory

from being accidentally programmed or erased due to program runaway etc., apply 12 V

PP only when programming or erasing flash memory. Overprogramming or

overerasing due to program runaway can cause memory cells to malfunction. While 12 V

is applied, the watchdog timer should be running and enabled to halt runaway program

execution, so that program runaway will not lead to overprogramming or overerasing. For

details on applying, releasing, and shutting off V

PP, see section 20.7, Flash Memory

Programming and Erasing Precautions (5).

Set MD1 and MD0 to 10 or 11

(apply VIH to VCC to MD1)

Start from reset

Branch to flash memory on-board

update routine in RAM

(user program

Execute flash memory

on-board update routine in RAM

(update flash memory)

Branch to flash memory

on-board update program

Transfer on-board update routine

Release FVPP

(exit user program

Branch to application program

in flash memory*

Procedure

The flash memory on-board update

program is written in flash memory ahead

of time by the user.

1. Set MD1 and MD0 of the H8/3334YF

to 10 or 11, and start from a reset.

2. Branch to the flash memory on-board

update program in flash memory.

3. Transfer the on-board update routine

4. Branch to the on-board update routine

that was transferred into RAM.

5. Apply 12 V to the FVPP pin, to enter

user programming mode.

6. Execute the flash memory on-board

update routine in RAM, to perform an

on-board update of the flash memory.

7. Change the voltage at the FVPP pin

from 12 V to VCC, to exit user

programming mode.

8. After the on-board update of flash

memory ends, execution branches to

an application program in flash

Note: * After the update is finished, when input of 12 V to the FV

PP pin is released, the flash

memory read setup time (t

FRS) must elapse before any program in flash memory is

executed. This is the required setup time from when the FV

PP pin reaches the (VCC

+ 2 V) level after 12 V is released until flash memory can be read.

Figure 20.7 User Programming Mode Operation (Example)

相關(guān)PDF資料	PDF描述
HD6433394TF12	MROM, 12 MHz, MICROCONTROLLER, PQFP80
HD6433388CP6	MROM, MICROCONTROLLER, PQCC84
HD6433388F8	MROM, MICROCONTROLLER, PQFP80
HD6473378CP10	16-BIT, OTPROM, MICROCONTROLLER, PQCC84
HD6433368F10	MROM, MICROCONTROLLER, PQFP80

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
HD6433394TF	制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Hitachi Single Chip Microcomputer
HD6433394TF10	制造商:未知廠家制造商全稱:未知廠家功能描述:Microcontroller
HD6433394TF12	制造商:未知廠家制造商全稱:未知廠家功能描述:16-Bit Microcontroller
HD6433394TF16	制造商:未知廠家制造商全稱:未知廠家功能描述:16-Bit Microcontroller
HD6433394VCP10	制造商:未知廠家制造商全稱:未知廠家功能描述:16-Bit Microcontroller

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