HT85F2270 datasheet(39/226 Pages) HOLTEK

部件名	HT85F2270

功能描述	Standard 8051 8-Bit Flash MCU

PDF	226 Pages

Scroll/Zoom	100%

制造商	HOLTEK [Holtek Semiconductor Inc]

网页	http://www.holtek.com

标志

39 / 226 page

Rev. 1.00

�9 of ��6

�a� 1�� 01�

Standard 8051 8-Bit Flash MCU

HT85F2260/HT85F2270/HT85F2280

Byte Read Operation

The Flash memory must be first unlocked before implementing a byte read procedure. The flash

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

Memory Page Read function is selected by the control bit, FMCR.1, in the FMCR register. When

the FMCR.7 bit is set high the Byte Read procedure will be initiated. When the procedure is ready,

the MCU will continue to run automatically. The following flowchart illustrates the Byte Read

procedure.

START

END

Write F�AR�

Write F�AR1

Write F�AR0

Flash memor� controller must be

In unlocked state

F�CR Bit 1 = 1

This will trigger b�te-reading action

F�CR Bit 7 = 1

Read F�DR

End Reading

Yes

Check F�SR Bit 1 = 1

Yes

Byte Read Flowchart

HT85F2270 数据表(PDF) 39 Page - Holtek Semiconductor Inc