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Renesas SH7781 User Manual

Page 58

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2. Programming Model

Rev.1.00 Jan. 10, 2008 Page 28 of 1658
REJ09B0261-0100

Table 2.1

Initial Register Values

Type Registers

Initial Value*

General registers R0_BANK0 to R7_BANK0,

R0_BANK1 to R7_BANK1,
R8 to R15

Undefined

SR

MD bit = 1, RB bit = 1, BL bit = 1, FD bit = 0,
IMASK = B'1111, reserved bits = 0,
others = undefined

GBR, SSR, SPC, SGR, DBR Undefined

Control registers

VBR H'00000000

MACH, MACL, PR

Undefined

System registers

PC H'A0000000

Floating-point
registers

FR0 to FR15, XF0 to XF15,
FPUL

Undefined

FPSCR

H'00040001

Note: * Initialized by a power-on reset and manual reset.

The CPU register configuration in each processing mode is shown in figure 2.2.

User mode and privileged mode are switched by the processing mode bit (MD) in the status
register.