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HT85F2270 Datasheet(PDF) 39 Page - Holtek Semiconductor Inc |
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HT85F2270 Datasheet(HTML) 39 Page - Holtek Semiconductor Inc |
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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 No Check F�SR Bit 1 = 1 Yes No Byte Read Flowchart |
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