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HT85F2250 Datasheet(PDF) 39 Page - Holtek Semiconductor Inc

No. de pieza HT85F2250
Descripción Electrónicos  A/D Flash 8051 Core Low Pin Count MCU
PDF  187 Pages
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Fabricante Electrónico  HOLTEK [Holtek Semiconductor Inc]
Página de inicio  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT85F2250 Datasheet(HTML) 39 Page - Holtek Semiconductor Inc

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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
No
Page Erase Flowchart



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