CHAPTER 3 CPU ARCHITECTURE
70
User’s Manual U11302EJ4V0UM
3.3.3 Table indirect addressing
[Function]
Table contents (branch destination address) of the particular location to be addressed by bits 1 to 5 of the
immediate data of an operation code are transferred to the program counter (PC) and branched.
Table indirect addressing is carried out when the CALLT [addr5] instruction is executed. This instruction can
refer to the address stored in the memory table 40H to 7FH and branch to all the memory spaces.
[Illustration]
15
1
15
0
PC
7
0
Low addr.
High addr.
Memory (table)
Effective a 1
Effective address
0
1
0
0
0
0
0
0
0
0
8
7
8
7
6
5
0
0
1
1
1
7
6
5
1
0
ta
4_0
Operation code
Содержание mPD780208 Subseries
Страница 2: ...2 User s Manual U11302EJ4V0UM MEMO...