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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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GMS30004 датащи(PDF) 37 Page - Hynix Semiconductor |
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GMS30004 датащи(HTML) 37 Page - Hynix Semiconductor |
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37 / 158 page  3 - 10 (16) CAL a Naming : Subroutine Call on status 1 Status : Conditional depending on the status Format : ì Operand : Subroutine code address a(Addr) Function : When ST =1 , PC à a(Addr) PA à PB SR1 à PC + 1, PSR1 à PA SR2 à SR1 PSR2 à PSR1 SR3 à SR2 PSR3 à PSR2 When ST = 0 PC à PC + 1 PB à PS ST à 1 Note : PC actually has pseudo-random count against the next instruction. <Comment> • In a program, control is allowed to be transferred to a mutual subroutine. Since a call instruction preserves the return address, it is possible to call the subroutine from different locations in a program, and the subroutine can return control accurately to the address that is preserved by the use of the call return instruction (RTN). Such calling is always conditional depending on the status. a. If the status is reset, call is not executed. b. If the status is set, call is rightly executed. The subroutine stack (SR) of three levels enables a subroutine to be manipulated on three levels. Besides, a long call (to call another page) can be executed on any level. • For a long call, an LPBI instruction should be executed before the CAL. When LPBI is omitted (and when PA=PB), a short call (calling in the same page) is executed. Chapter 3. Instruction |
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