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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DP80390 датащи(PDF) 16 Page - Digital Core Design |
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DP80390 датащи(HTML) 16 Page - Digital Core Design |
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16 / 84 page  DP80390 Instructions set details - 16 - All trademarks mentioned in this document http://www.DigitalCoreDesign.com are trademarks of their respective owners. http://www.dcd.pl Copyright 1999-2003 DCD – Digital Core Design. All Rights Reserved. 3.1.2. FLAT Instruction: ACALL addr19 Function: Absolute call Description: ACALL unconditionally calls a subroutine located at the indicated address. The instruction increments the PC triple to obtain the address of the following instruction, then pushes the 24-bit result onto the stack (low-order byte first) and increments the stack pointer triple. The destination address is obtained by successively concatenating the five high-order bits of the incremented PC, opcode bits 7-5, the second and third byte of the instruction. The subroutine called must therefore start within the same 512K block of program memory as the first byte of the instruction following ACALL. No flags are affected. Operation: (PC) ← (PC) + 3 (SP) ← (SP) + 1 ((SP)) ← (PC7-0) (SP) ← (SP) + 1 ((SP)) ← (PC15-8) (SP) ← (SP) + 1 ((SP)) ← (PC23-16) (PC18-0) ← page address Bytes: 3 Cycles: 5 Encoding: a18 a17 a16 1 0 0 0 1 a15 a14 a13 a12 a11 a10 a9 a8 a7 a6 a5 a4 a3 a2 a1 a0 * instruction modified regarding to standard 80C51 |
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