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数据搜索系统，热门电子元器件搜索 |
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HCS12 数据表(PDF) 121 Page - Freescale Semiconductor, Inc |
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HCS12 数据表(HTML) 121 Page - Freescale Semiconductor, Inc |
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121 / 452 page  S12CPUV2 Reference Manual, Rev. 4.0 Freescale Semiconductor 121 Operation: If Z = 1, then (PC) + $0002 + Rel ⇒ PC Simple branch Description: Tests the Z status bit and branches if Z = 1. See 3.8 Relative Addressing Mode for details of branch execution. BEQ Branch if Equal BEQ CCR Details: S X HIN Z V C –––––––– Source Form Address Mode Object Code Access Detail HCS12 M68HC12 BEQ rel8 REL 27 rr PPP/P(1) 1. PPP/P indicates this instruction takes three cycles to refill the instruction queue if the branch is taken and one program fetch cycle if the branch is not taken. PPP/P(1) Branch Complementary Branch Test Mnemonic Opcode Boolean Test Mnemonic Opcode Comment r>m BGT 2E Z + (N ⊕ V) = 0 r ≤m BLE 2F Signed r ≥m BGE 2C N ⊕ V = 0 r<m BLT 2D Signed r=m BEQ 27 Z = 1 r ≠m BNE 26 Signed r ≤m BLE 2F Z + (N ⊕ V) = 1 r>m BGT 2E Signed r<m BLT 2D N ⊕ V = 1 r ≥m BGE 2C Signed r>m BHI 22 C + Z = 0 r ≤m BLS 23 Unsigned r ≥m BHS/BCC 24 C = 0 r<m BLO/BCS 25 Unsigned r=m BEQ 27 Z = 1 r ≠m BNE 26 Unsigned r ≤m BLS 23 C + Z = 1 r>m BHI 22 Unsigned r<m BLO/BCS 25 C = 1 r ≥m BHS/BCC 24 Unsigned Carry BCS 25 C = 1 No Carry BCC 24 Simple Negative BMI 2B N = 1 Plus BPL 2A Simple Overflow BVS 29 V = 1 No Overflow BVC 28 Simple r=0 BEQ 27 Z = 1 r ≠0 BNE 26 Simple Always BRA 20 — Never BRN 21 Unconditional |
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