Filter
Top Products
15
Section 2 Software Specifications when Using the
SH2A_custom_SoC
2.1 Differences between the MCU and the Emulator
1. When the emulator system is initiated, it initializes the general registers and part of the control
registers as shown in table 2.1. The initial values of the MCU are undefined. When the
emulator is initiated from the workspace, a value to be entered is saved in a session.
Table 2.1 Register Initial Values at Emulator Link Up
Register Emulator at Link Up
R0 to R14 H'00000000
R15 (SP) Value of the SP in the power-on reset vector table
PC Value of the PC in the power-on reset vector table
SR H'000000F0
GBR H'00000000
VBR H'00000000
TBR H'00000000
MACH H'00000000
MACL H'00000000
PR H'00000000
FPSCR* H'00040001
FPUL* H'00000000
FPR0-15* H'00000000
Note: If the MCU does not incorporate the floating-point unit (FPU), these registers are not
displayed.
Note: When a value of the interrupt mask bit in the SR register is changed in the [Registers]
window, it is actually reflected in that register immediately before execution of the user
program is started. It also applies when the value is changed by the REGISTER_SET
command.
2. The emulator uses the H-UDI; do not access the H-UDI.