CP80S54E ETC2 [List of Unclassifed Manufacturers], CP80S54E Datasheet - Page 8

• Manufacturer Part Number: CP80S54E
• Description: EPROM/ROM-Based 8-Bit Microcontroller Series
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

FIGURE 2.2: Loading of PC in Different Situations
Situation 1: GOTO Instruction
Situation 2: CALL Instruction
Situation 3: RETIA, RETFIE, or RETURN Instruction
Situation 4: Instruction with PCL as destination
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.
PC
PC
PC
PC
PCH
9 8 7
PCH
9 8 7
PCH
9 8 7
PCH
9 8 7
-
-
-
-
-
-
-
PCHBUF<1:0>
-
-
-
-
-
-
-
-
-
-
-
-
-
PCHBUF
PCHBUF
PCHBUF
PCHBUF
PCL
PCL
PCL
PCL
-
-
-
-
0
0
0
0
ALU result<7:0>
or Opcode<7:0>
Opcode<9:0>
Opcode<9:0>
STACK<9:0>
STACK<9:0>
CP80S54/56
Rev0.1 Nov 30, 2005
P.8/CP80S54/S56