HT85F2250 datasheet(39/187 Pages) HOLTEK

Part #	HT85F2250

Description	A/D Flash 8051 Core Low Pin Count MCU

PDF	187 Pages

Scroll/Zoom	100%

Manufacturer	HOLTEK [Holtek Semiconductor Inc]

Direct Link	http://www.holtek.com

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39 / 187 page

Rev. 1.10

�9 of 187

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A/D Flash 8051 Core Low Pin Count MCU

HT85F2250/HT85F2262

Page Erase Operation

The Flash Memory must be first unlocked before implementing a page erase procedure. The

flash memory address is setup using the control registers, FMAR0, FMAR1 and FMAR2. The

Flash Memory Page Erase function is selected by the control bit, FMCR.2, in the FMCR register.

Setting the FMCR.7 bit high will start the Page Erase procedure. When the procedure has finished,

the MCU will continue to run automatically. The following flowchart illustrates the Page Erase

procedure.

START

END

Write FMAR�

Write FMAR1

Write FMAR0

MCU waits for page-erasing finished.

Then MCU contin�es to r�n.

F�ash memor� contro��er m�st be

In �n�ocked state

FMCR Bit � = 1

This wi�� trigger page-erasing action

FMCR Bit 7 = 1

Check FMSR Bit 1 = 1

Yes

Page Erase Flowchart

HT85F2250 Datasheet(PDF) 39 Page - Holtek Semiconductor Inc