參數(shù)資料
型號: μPD789F806Y
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機(jī)微控制器(8位單片微控制器)
文件頁數(shù): 28/125頁
文件大?。?/td> 366K
代理商: ΜPD789F806Y
CHAPTER 2 REGISTERS
11
2.3 SPECIAL-FUNCTION REGISTER (SFR)
Unlike a general-purpose register, each special-function register has a special function.
It is allocated in the 256-byte area FF00H to FFFFH.
A special-function register can be manipulated, like a general-purpose register, with the operation, transfer and
bit manipulation instructions. Manipulatable bit units (1, 8, and 16) differ depending on the special-function register
type.
Each manipulation bit unit can be specified as follows.
1-bit manipulation
Describes a symbol reserved with assembler for the 1-bit manipulation instruction operand (sfr.bit). This
manipulation can also be specified with an address.
8-bit manipulation
Describes a symbol reserved with assembler for the 8-bit manipulation instruction operand (sfr). This
manipulation can also be specified with an address.
16-bit manipulation
Describes a symbol reserved with assembler for the 16-bit manipulation instruction operand. When
addressing an address, describe an even address.
For details of the special function registers, refer to
each product user's manual
.
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