參數(shù)資料
型號: μPD70F3003
廠商: NEC Corp.
英文描述: 16/32 Bit Single Chip Microcontrollers(16/32 位單片微控制器)
中文描述: 16/32位單片機微控制器(16/32位單片微控制器)
文件頁數(shù): 23/141頁
文件大小: 374K
代理商: ΜPD70F3003
11
CHAPTER 2 REGISTER SET
2.2.5 System register number
Data in the system registers is accessed by using the load/store system register instructions, LDSR and STSR.
Each register is assigned a unique number which is referenced by the LDSR and STSR instructions.
Table 2-1. System Register Number
Number
System Register
Operand Specification
LDSR
STSR
0
EIPC
1
EIPSW
2
FEPC
3
FEPSW
4
ECR
5
PSW
6 - 31
Reserved
Reserved : Accessing registers in this range is prohibited and will lead to undefined
results.
: Accessing prohibited
: Accessing enabled
Caution When using the LDSR instruction with the EIPC and FEPC registers, only even address values
should be specified. After interrupt servicing has ended with a RETI instruction, bit 0 in the EIPC
and FEPC registers will be ignored and assumed to be zero when the PC is restored.
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