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Table 2.2-1 Default Space
Default space
Program space
PC indirect, program access, branch instruction
Data space
Addressing mode using @RW0, @RW1, @RW4, and @RW5; @A; addr16; dir
Stack space
Addressing mode using PUCHW, POPW, @RW3, and @RW7
Additional space
Addressing mode using @RW2 and @RW6
Figure 2.2-4 shows an example of a memory space divided for a register bank.
FFFFFF
H
Program space
FF0000
H
B3FFFF
H
Additional space
B30000
H
92FFFF
H
User stack space
920000
H
68FFFF
H
680000
H
4BFFFF
H
System stack space
4B0000
H
000000
H
Figure 2.2-4 Physical address in each space
Data space
Addressing mode
: PCB (Program counter bank register)
FE
H
: ADB (Additional data bank register)
B3
H
: USB (User stack bank register)
92
H
: DTB (Data bank register)
68
H
: SSB (System stack bank register)
4B
H
CHAPTER 2 CPU
27
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