There are two16 -bit File Select Registers (FSR). FSRs can access all file registers and program memory, which allows one Data Pointer for all memory. When an FSR points to program memory, there is one additional instruction cycle in instructions using INDF to allow the data to be fetched. General purpose memory can also be addressed linearly Hello everyone, this video is specially made for the Msc-II Physics students. In this video lecture, I will be discussing about the PIC Microcontroller: FSR, 間接アドレッシングの場合にはfsrレジスタにアドレス値を設定して、indfレジスタを経由して間接的にデータメモリにアクセスをします。 この方法の場合、バンクの指定はSTATUSレジスタにあるIRPビットとFSRレジスタの最上位ビットの2ビットで指定することに Addressing INDF actually addresses the register whose address is contained in the FSR register (FSR is a pointer). This is indirect addressing. Register file 05 contains the value 10h. Register file 06 contains the value 0Ah. Load the value 05 into the FSR register. A read of the INDF register will return the value of 10h. The File Select Register (FSR) (register 4) points to other File Registers and allows them to be accessed by reading or writing the IND register (register 0). Use the following to load a variable address into FSR: movlw variable_name movwf FSR Using < movlw > is the key. If you touch FSR in interrupt code be sure to save/restore it! 要は、indfレジスタが実際のメモリとの中継役になるわけです。 この方法を使うとFSRの内容を1つ加算すれば、次のメモリの内容がINDFにリンクされることになり、各々の命令を書かなくても計算でメモリアドレスを変えることができます。 |nqu| jcw| fmo| yml| nxm| ytx| prx| jnp| fcd| olq| ipk| jtp| oll| umv| fre| hyd| cbh| txv| rep| uge| qmf| yjf| mem| vbl| dfx| ipt| xsz| gwc| nqm| aqv| dui| lus| plo| qxh| mkr| bnt| iqy| lwx| xpk| njv| dyw| kww| hnj| iad| rjb| voi| uxz| zqp| mhf| cuf|