UPD78F0138 NEC, UPD78F0138 Datasheet - Page 80

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

3.3.3 Table indirect addressing
3.3.4 Register addressing
80
[Function]
[Illustration]
[Function]
[Illustration]
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.
Register pair (AX) contents to be specified with an instruction word are transferred to the program counter (PC)
and branched.
This function is carried out when the BR AX instruction is executed.
Effective address+1
Effective address
Operation code
rp
PC
7
15
PC
15
15
7
7
1
0
CHAPTER 3 CPU ARCHITECTURE
1
0
6
Memory (Table)
User’s Manual U16228EJ2V0UD
A
5
0
High Addr.
Low Addr.
0
ta
0
4–0
0
0
8
0
1
7
7
0
8
0
8
0
1
7
0
7
6
1
X
5
0
0
1
0
0
0