Renesas R8C/Tiny Series Software Manual page 49

Chapter 2 Addressing Modes
Address register relative
base:8[A0]
The bit that is the number of bits
base:8[A1]
indicated by the address register
base:16[A0] (A0/A1) away from bit 0 at the
address indicated by base is the
base:16[A1]
object of the operation.
However, if the address of the bit
that is the object of the operation
exceeds 0FFFF
above are ignored and the
address returns to 00000
The address range that can be
specified by the address register
(A0/A1) extends 8,192 bytes
from base.
SB relative
The bit that is the number of bits
bit,base:8[SB]
indicated by bit away from bit 0 at
bit,base:11[SB]
the address indicated by the static
bit,base:16[SB]
base register (SB) plus the value
indicated by base (added without
the sign bits) is the object of the
operation.
However, if the address of the bit
that is the object of the operation
exceeds 0FFFF
above are ignored and the address
returns to 00000
The address ranges that can be
specified by bit,base:8, bit,base:11,
and bit,base:16, respectively, extend
32 bytes, 256 bytes, and 8,192
bytes from the static base register
(SB) value.
Rev.2.00 Oct 17, 2005
REJ09B0001-0200
, bits 17 and
16
, bits 17 and
16
.
16
page 31 of 263
.
16
Register
SB
address
2.5 Bit Instruction Addressing
b7 b0
base
Bit position
Memory
b7
address
base
Bit position
b0