參數(shù)資料
型號: μPD703008
廠商: NEC Corp.
英文描述: 16/32 Bit RISC Microcontrollers(16/32位RISC微控制器)
中文描述: 16/32位RISC微控制器(16/32位的RISC微控制器)
文件頁數(shù): 20/141頁
文件大?。?/td> 374K
代理商: ΜPD703008
CHAPTER 2 REGISTER SET
8
2.2 System Registers
The system registers control the status of the V850 family and holds information on interrupts.
Figure 2-3. System Registers
2.2.1 Interrupt status saving registers
Two interrupt status saving registers are provided: EIPC and EIPSW.
The contents of the PC and PSW are respectively saved in these registers if an exception or interrupt occurs.
If the NMI occurs, however, the contents of the PC and PSW are saved to NMI status saving registers.
When an exception or interrupt occurs, the address of the following instruction is saved in the EIPC register. If
an interrupt occurs while a division (DIVH) instruction is executed, the address of the division instruction currently
being executed is saved.
The current value of the PSW is saved to the EIPSW.
Because only one pair of interrupt status saving registers is provided, the contents of these registers must be saved
by program when multiple interrupts are enabled.
Bits 24 through 31 of the EIPC and bits 8 through 31 of the EIPSW are fixed to 0.
EIPC
EIPSW
Exception/Interrupt PC
Exception/Interrupt PSW
31
0
FEPC
FEPSW
Fatal Error PC
Fatal Error PSW
ECR
Exception Cause Register
PSW
Program Status Word
31
EIPC
PC
0
31
EIPSW
PSW
0
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