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Can the data registers R0, R1, R2, R3 be mixed as 8-bit, 16-bit, 32-bit register?

最新更新:10/10/2006

Question:

Can the data registers R0, R1, R2, R3 be mixed as 8-bit, 16-bit, 32-bit register?

Answer:

High (R0H/R1H) and low (R0L/R1L) of R0/R1 can be used as 8-bit data register separately. Also, it can be used as 32-bit data register (R2R0/R3R1) in combination with R2 and R0, R3 and R1 on some instructions.
Suitable Products
R8C/18
R8C/19
R8C/1A
R8C/1B
R8C/20
R8C/21
R8C/22
R8C/23
R8C/24
R8C/25
R8C/26
R8C/27
R8C/28
R8C/29
R8C/2A
R8C/2B
R8C/2C
R8C/2D
R8C/2E
R8C/2F
R8C/2G
R8C/2H
R8C/2J
R8C/2K
R8C/2L
R8C/32C
R8C/33C
R8C/34C
R8C/35C
R8C/36C
R8C/38C
R8C/3GC
R8C/3JC
R8C/32D
R8C/33D
R8C/35D
R8C/3GD
R8C/33T
R8C/38A
R8C/34E, R8C/34F, R8C/34G, R8C/34H
R8C/36E, R8C/36F, R8C/36G, R8C/36H
R8C/38E, R8C/38F, R8C/38G, R8C/38H
R8C/L35C
R8C/L36C
R8C/L38C
R8C/L3AC