CP80S54E ETC2 [List of Unclassifed Manufacturers], CP80S54E Datasheet - Page 34

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

RETIA
Syntax:
Operands:
Operation:
Status Affected:
Description:
Cycles:
RETURN
Syntax:
Operands:
Operation:
Status Affected:
Description:
Cycles:
RLR
Syntax:
Operands:
Operation:
Status Affected:
Description:
Cycles:
RRR
Syntax:
Operands:
Operation:
Status Affected:
Description:
Cycles:
Return with Immediate in ACC
RETIA I
0
Top of Stack
None
The ACC register is loaded with the 8-bit immediate ‘I’. The program counter is loaded from
the top of the stack (the return address). This is a two-cycle instruction.
2
RETURN
None
Top of Stack
None
The program counter is loaded from the top of the stack (the return address). This is a
two-cycle instruction.
2
Rotate Left f through Carry
RLR R, d
0
d
C
C
The contents of register ‘R’ are rotated one bit to the left through the Carry Flag. If ‘d’ is 0 the
result is placed in the ACC register. If ‘d’ is 1 the result is stored back in register ‘R’.
1
RRR R, d
0
d
R<0>
C
The contents of register ‘R’ are rotated one bit to the right through the Carry Flag. If ‘d’ is 0 the
result is placed in the ACC register. If ‘d’ is 1 the result is placed back in register ‘R’.
1
I
Return from Subroutine
R<7>
R<6:0>
Rotate Right f through Carry
C
R<7:1>
∈
∈
≤
≤
≤
I
R
[0,1]
R
[0,1]
ACC;
≤
dest<0>
dest<7>;
≤
≤
255
63
63
C;
C
dest<7:1>;
dest<6:0>;
PC
PC
CP80S54/56
Rev0.1 Nov 30, 2005
P.34/CP80S54/S56