HD6417705F133V Datasheet, PDF (82/741 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

2.3.3 Program Counter
The program counter (PC) stores the value obtained by adding 4 to the current instruction address.
There is no instruction to read the PC directly. Before an exception handling state is entered, the
PC is saved in the save program counter (SPC). Before a subroutine call is executed, the PC is
saved in the procedure register (PR). In addition, the PC can be used for PC relative addressing
mode.
Figure 2.5 shows the system register and program counter configurations.
Multiply and accumulate high and low registers (MACH/MACL)
31
0
MACH
MACL
Procedure register (PR)
31
0
PR
Program counter (PC)
31
0
PC
Figure 2.5 System Registers and Program Counter
Rev. 2.00, 09/03, page 34 of 690