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GMS37140T-DT 参数 Datasheet PDF下载

GMS37140T-DT图片预览
型号: GMS37140T-DT
PDF下载: 下载PDF文件 查看货源
内容描述: [Microcontroller, 4-Bit, OTPROM, 4MHz, CMOS, PDSO24, 0.300 INCH, SOP-24]
分类和应用: 计算机
文件页数/大小: 109 页 / 782 K
品牌: HYNIX [ HYNIX SEMICONDUCTOR ]
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Chapter 5. INSTRUCTION  
(16) CAL a  
Naming :  
Subroutine Call on status 1  
Status :  
Conditional depending on the status  
Format :  
Operand :  
Function :  
Subroutine code address a(Addr)  
When ST =1 , PC  
SR1  
a(Addr)  
PC + 1,  
SR1  
PA  
PB  
PA  
PSR1  
PSR2  
PSR1  
PSR2  
PSR3  
PB  
SR2  
SR3  
SR2  
When ST = 0 PC  
PC + 1  
PS ST  
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.  
5-9  
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