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SH7721 Datasheet(PDF) 109 Page - Renesas Technology Corp

Part # SH7721
Description  Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
PDF  1524 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7721 Datasheet(HTML) 109 Page - Renesas Technology Corp

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Section 2
CPU
Rev. 3.00 Jan. 18, 2008 Page 47 of 1458
REJ09B0033-0300
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.
MACH
MACL
31
0
PR
31
0
PC
31
0
Multiply and accumulate high and low registers (MACH/MACL)
Procedure register (PR)
Program counter (PC)
Figure 2.5
System Registers and Program Counter



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