8-bit MicrocontrollersのトピックRe: Doubt regarding HCS 08 MCU https://community.nxp.com/t5/8-bit-Microcontrollers/Doubt-regarding-HCS-08-MCU/m-p/126954#M1287 <HTML><HEAD></HEAD><BODY>"ADD ,X" does take 3 cycles. But not all instructions that use this addressing mode require 3 cycles. All the read-modify-write instructions (NEG, ASR, COM, etc.) take 4, "JSR ,X" takes 5, and "DBNZ ,X" takes 6.</BODY></HTML> Thu, 17 Aug 2006 20:34:42 GMT Wings 2006-08-17T20:34:42Z Doubt regarding HCS 08 MCU https://community.nxp.com/t5/8-bit-Microcontrollers/Doubt-regarding-HCS-08-MCU/m-p/126953#M1286 <HTML><HEAD></HEAD><BODY><DIV>Hello members,</DIV><DIV><SPAN>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; I am sarathi doing PG, I am new to this field i.e electronics. I am using HCS 08 MCU. In instruction set of this MCU, 1 instruction ADC ,X/ADD ,X or anythg space , X take 3 bus cycles. Can anybody able to clear my doubt. If u want you can mail me </SPAN><A class="jive-link-email-small" href="mailto:sarathius@yahoo.com">sarathius@yahoo.com</A></DIV></BODY></HTML> Thu, 17 Aug 2006 18:15:26 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/Doubt-regarding-HCS-08-MCU/m-p/126953#M1286 sarathi 2006-08-17T18:15:26Z Re: Doubt regarding HCS 08 MCU https://community.nxp.com/t5/8-bit-Microcontrollers/Doubt-regarding-HCS-08-MCU/m-p/126954#M1287 <HTML><HEAD></HEAD><BODY>"ADD ,X" does take 3 cycles. But not all instructions that use this addressing mode require 3 cycles. All the read-modify-write instructions (NEG, ASR, COM, etc.) take 4, "JSR ,X" takes 5, and "DBNZ ,X" takes 6.</BODY></HTML> Thu, 17 Aug 2006 20:34:42 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/Doubt-regarding-HCS-08-MCU/m-p/126954#M1287 Wings 2006-08-17T20:34:42Z