CP80S54E 데이터 시트보기 (PDF) - Unspecified

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CP80S54E

EPROM/ROM-Based 8-Bit Microcontroller Series

Unspecified 

CP80S54/56

FIGURE 2.2: Loading of PC in Different Situations

Situation 1: GOTO Instruction

PCH

PCL

987

0

PC

------

PCHBUF

Situation 2: CALL Instruction

PCH

PCL

987

0

PC

------

PCHBUF

Situation 3: RETIA, RETFIE, or RETURN Instruction

PCH

PCL

987

0

PC

Opcode<9:0>

STACK<9:0>

Opcode<9:0>

STACK<9:0>

------

PCHBUF

Situation 4: Instruction with PCL as destination

PCH

PCL

987

0

PC

PCHBUF<1:0>

------

PCHBUF

ALU result<7:0>

or Opcode<7:0>

Note: 1. Bits PC<9> and PCHBUF<1> are unimplemented for CP80S54/S54E.

2. PCHBUF is used only for instruction with PCL as destination for CP80S54/S54E/56/S56E.

Rev0.1 Nov 30, 2005

P.8/CP80S54/S56

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