RL78/G1P
CHAPTER 3 CPU ARCHITECTURE
R01UH0895EJ0100 Rev.1.00
58
Nov 29, 2019
Figure 3-29. Example of ES:word[BC]
X0000H
rp(BC)
X0000H
ES
ES: word [BC]
OP-code
Low Addr.
High Addr.
Specifies a
64 KB area
Offset
<3>
<3>
<1>
Instruction code
<1> <2>
<2>
<3>
<1>
<2>
Target memory
Memory
XFFFFH
Array of
word-sized
data
Address of a word within an array
The ES register <1> specifies a 64-Kbyte area within the
overall 1-Mbyte space as the four higher-order bits, X, of
the address range.
"
word
"
<2> specifies the address where the target array of
word-sized data starts in the 64 KB area specified in the
ES register <1>.
A pair of registers <3> specifies an offset within the array to
the target location in memory.