NEC mPD780344 Series User Manual page 76

8-bit single-chip microcontrollers
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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.
This function is carried out when the CALLT [addr5] instruction is executed.
This instruction references the address stored in the memory table from 40H to 7FH, and allows branching to
the entire memory space.
[Illustration]
Operation code
Effective address
Effective address + 1
76
CHAPTER 3 CPU ARCHITECTURE
7
6
5
1
1
ta
4–0
15
0
0
0
0
0
0
7
Memory (table)
Low addr.
High addr.
15
PC
User's Manual U15798EJ2V0UD
1
0
1
8
7
6
5
0
0
0
1
0
8
7
1
0
0
0

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