NEC 78014Y Series, User Manual

Page: 113 / 547

www.DataSheet4U.com
CHAPTER 5 CPU ARCHITECTURE
113
5.3.3 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]
7 0
High Addr.
PC
15 0 8 7
Low Addr.
Effective Address
15 0 8 7
Operation Code
7
0 0 0 0 0 0 0 0 0 1 0
6 5
1 1 ta
4-0
1
Memory (Table)
1
Effective 1
6 5 1 0