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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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D950-CORE 데이터시트(PDF) 25 Page - STMicroelectronics |
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D950-CORE 데이터시트(HTML) 25 Page - STMicroelectronics |
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25 / 89 page  25/89 D950-Core 4.3 Program Control Unit (PCU) 4.3.1 Introduction The D950-Core PCU includes the following components: • 16-bit Program Counter (PC) • 9 x 16-bit Loop registers (3 x LS, 3 x LE, 3 x LC) • Branch and Hardware Loops control logic including CCR and PORT condition decoding • 2 bits of STA register for interrupt control • 2 bits of CCR for loop management • Reset, Hold and Low-Power operation control logic • Stack control logic for automatic PC save and restore in Subroutine Calls and Interrupts. (The Stack is implemented in a user-defined dedicated X-RAM area. The Stack pointer and its control logic are included in the ACU, see Section 4.2.1.) •PPort Figure 4.11 D950-Core Program Control Unit XRAM STACK SPX 16 CONTROL IR MUX IA ID LS0:2 LE0:2 LC0:2 LS YD XD 16 16 RESET + 1 BRANCH / IT @ RTS / RTI @ LOOP REGISTERS TO OTHER UNITS CCR COND. (13) PORT COND. (8) 16 16 16-BIT PC STA 2 2 RESET IT LP HOLD VR02017J 8 P.PORT PORT COND 8 P 8 P_EN 5 |
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