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33FJ128GP708 数据表(PDF) 41 Page - Microchip Technology |
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33FJ128GP708 数据表(HTML) 41 Page - Microchip Technology |
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41 / 90 page  © 2005 Microchip Technology Inc. Preliminary DS70155C-page 39 dsPIC33F TABLE 9-9: PROGRAM FLOW INSTRUCTIONS Assembly Syntax Description Words Cycles BRA Expr Branch unconditionally 1 2 BRA Wn Computed branch 1 2 BRA C,Expr Branch if Carry (no Borrow) 1 1 (2) BRA GE,Expr Branch if greater than or equal 1 1 (2) BRA GEU,Expr Branch if unsigned greater than or equal 1 1 (2) BRA GT,Expr Branch if greater than 1 1 (2) BRA GTU,Expr Branch if unsigned greater than 1 1 (2) BRA LE,Expr Branch if less than or equal 1 1 (2) BRA LEU,Expr Branch if unsigned less than or equal 1 1 (2) BRA LT,Expr Branch if less than 1 1 (2) BRA LTU,Expr Branch if unsigned less than 1 1 (2) BRA N,Expr Branch if Negative 1 1 (2) BRA NC,Expr Branch if not Carry (Borrow) 1 1 (2) BRA NN,Expr Branch if not Negative 1 1 (2) BRA NOV,Expr Branch if not Overflow 1 1 (2) BRA NZ,Expr Branch if not Zero 1 1 (2) BRA OA,Expr Branch if Accumulator A Overflow 1 1 (2) BRA OB,Expr Branch if Accumulator B Overflow 1 1 (2) BRA OV,Expr Branch if Overflow 1 1 (2) BRA SA,Expr Branch if Accumulator A Saturate 1 1 (2) BRA SB,Expr Branch if Accumulator B Saturate 1 1 (2) BRA Z,Expr Branch if Zero 1 1 (2) CALL Expr Call subroutine 2 2 CALL Wn Call indirect subroutine 1 2 DO #lit14,Expr Do code through PC + Expr, (lit14 + 1) times 2 2 DO Wn,Expr Do code through PC + Expr, (Wn + 1) times 2 2 GOTO Expr Go to address 2 2 GOTO Wn Go to address indirectly 1 2 RCALL Expr Relative call 1 2 RCALL Wn Computed call 1 2 REPEAT #lit14 Repeat next instruction (lit14 + 1) times 1 1 REPEAT Wn Repeat next instruction (Wn + 1) times 1 1 RETFIE Return from interrupt enable 1 3 (2) RETLW #lit10,Wn Return with lit10 in Wn 1 3 (2) RETURN Return from subroutine 1 3 (2) Note 1: Conditional branch instructions execute in 1 cycle if the branch is not taken, or 2 cycles if the branch is taken. 2: RETURN normally executes in 3 cycles; however, it executes in 2 cycles if an interrupt is pending. |
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