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SYNPWM 데이터시트(PDF) 8 Page - Feeling Technology Corp. |
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SYNPWM 데이터시트(HTML) 8 Page - Feeling Technology Corp. |
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8 / 57 page ![]() FM8P73B Web site: http://www.feeling-tech.com.tw Rev1.0 Nov 20, 2013 P.8/FM8P73B FEELING TECHNOLOGY 2.0 FUNCTIONAL DESCRIPTIONS 2.1 Operational Registers 2.1.1 INDF (Indirect Addressing Register) Address Name B7 B6 B5 B4 B3 B2 B1 B0 00h (r/w) INDF Uses contents of FSR to address data memory (not a physical register) The INDF Register is not a physical register. Any instruction accessing the INDF register can actually access the register pointed by FSR Register. Reading the INDF register itself indirectly (FSR=”0”) will read 00h. Writing to the INDF register indirectly results in a no-operation (although status bits may be affected). Example 2.1: INDIRECT ADDRESSING Register file 30 contains the value 10h Register file 31 contains the value 0Ah Load the value 30 into the FSR Register A read of the INDF Register will return the value of 10h Increment the value of the FSR Register by one (@FSR=31h) A read of the INDF register now will return the value of 0Ah. Figure 2.1: Direct/Indirect Addressing for FM8P73B location select addressing INDF register location select 6Fh 00h Indirect Addressing 0 From FSR register 7 0 6 Direct Addressing From opcode 7 0 0 |
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