7 APPLICATION INSTRUCTION
7.1 Rotation Instruction
319
7
â– RCR(P)
• These instructions rotate the 16-bit binary data in the device specified by (d) to the right by (n) bit(s) (including the carry
flag). The carry flag is on or off depending on the status prior to the execution of the instruction.
• When (d) is a bit device, bits are rotated to the right within the device range specified by digit specification. The number of
bits actually to be rotated is the remainder of (n)(specified number of bits). For example, when (n) is 15 and the specified
number of bits is 12, 3 bits are rotated because 15 divided by 12 equals 1 with a remainder of 3.
• Specify any value between 0 and 15 for (n). If a value 16 or bigger is specified, bits are rotated by the remainder value of
n16. For example, when (n) is 18, 2 bits are rotated because 18 divided by 16 equals 1 with a remainder of 2.
• Do not set a negative value to the number of bits to be rotated (n).
• In the case of continuous operation type instructions (ROR and RCR), note that shift and rotation are executed in every
scan time (operation cycle).
There is no operation error.
1
(d)
0
(d)
1
(d)
0
(d)
0
10000000 0
0
0100 0
b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1
b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1
0
00000000 0
0
0000 1
0
00000000 0
0
00 1 0
b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1
b0
b7
b15 b8b14 b13 b12 b11 b10 b9 b6
b5
b4 b3 b2 b1
Value of b0
Value of b(n-1)
Carry flag value
Rotating 1-bit data to the right
Value of b0
Carry flag value
Carry flag (SM700, SM8022)
Carry flag (SM700, SM8022)
Carry flag (SM700, SM8022)
Carry flag (SM700, SM8022)
Rotating n-bit data to the right
Rotating 1-bit data
to the right
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