Register Banks - Renesas R8C/Tiny Series Software Manual

Chapter 1 Overview

1.5 Register Banks

The R8C/Tiny has two register banks, each comprising data registers (R0, R1, R2, and R3), address regis-
ters (A0 and A1), and a frame base register (FB). These two register banks are switched by the register
bank select flag (B flag) in the flag register (FLG).
Figure 1.5.1 shows the configuration of the register banks.
Register bank 0 (B flag = 0)
R0
R1
R2
R3
A0
A1
FB
Figure 1.5.1 Configuration of Register Banks
Rev.2.00 Oct 17, 2005
REJ09B0001-0200
b15 b8b7 b0
H L
H L
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1.5 Register Banks
Register bank 1 (B flag = 1)
b15 b8b7
R0 H L
R1 H L
R2
R3
A0
A1
FB
b0