Register Bank - Renesas R8C/Tiny Series Software Manual

Chapter 1 Overview

1.5 Register Bank

The R8C/Tiny has two register banks, each configured with data registers (R0, R1, R2, and R3), address
registers (A0 and A1), and frame base register (FB). These two register banks are switched over by the
register bank select flag (B flag) of the flag register (FLG).
Figure 1.5.1 shows a configuration of register banks.
Register bank 0 (B flag = 0)
R0
R1
R2
R3
A0
A1
FB
Figure 1.5.1 Configuration of register banks
b15 b8b7 b0
H L
H L
Register bank 1 (B flag = 1)
b15
R0
R1
R2
R3
A0
A1
FB
8
1.5 Register Bank
b8b7 b0
H L
H L