参数资料
型号: 78k
厂商: NEC Corp.
英文描述: Common to 78K/0 Series
中文描述: 共同的78K / 0系列
文件页数: 15/129页
文件大小: 644K
代理商: 78K
15
CHAPTER 2 REGISTERS
User's Manual U12326EJ4V0UM
(1) Interrupt enable flag (IE)
This flag controls the interrupt request acknowledgement operations of the CPU.
When IE = 0, the IE flag is set to interrupt disable (DI), and interrupts other than non-maskable interrupts
are all disabled.
When IE = 1, the IE flag is set to interrupt enable (EI), and interrupt request acknowledgement is controlled
by an in-service priority flag (ISP), an interrupt mask flag for various interrupt sources, and a priority
specification flag.
This flag is reset (0) upon DI instruction execution or interrupt request acknowledgment and is set (1) upon
execution of the EI instruction.
(2) Zero flag (Z)
When the operation result is zero, this flag is set (1). It is reset (0) in all other cases.
(3) Register bank select flags (RBS0 and RBS1)
These are 2-bit flags used to select one of the four register banks.
In these flags, the 2-bit information that indicates the register bank selected by SBL RBn instruction
execution is stored.
(4) Auxiliary carry flag (AC)
If the operation result has a carry from bit 3 or a borrow at bit 3, this flag is set (1). It is reset (0) in all other
cases.
(5) In-service priority flag (ISP)
This flag manages the priority of acknowledgeable maskable vectored interrupts. When ISP = 0, vectored
interrupt requests specified as low priority by the priority specification flag register (PR) are disabled for
acknowledgment. Actual acknowledgment for interrupt requests is controlled by the state of the interrupt
enable flag (IE).
(6) Carry flag (CY)
This flag stores an overflow or underflow upon add/subtract instruction execution. It stores the shift-out
value upon rotate instruction execution and functions as a bit accumulator during bit manipulation
instruction execution.
相关PDF资料
PDF描述
7805ALP 16-Bit Latchup Protected ADC
7805ALPRPDE 16-Bit Latchup Protected ADC
7805ALPRPDH 16-Bit Latchup Protected ADC
7805ALPRPDI 16-Bit Latchup Protected ADC
7805ALPRPDK 16-Bit Latchup Protected ADC
相关代理商/技术参数
参数描述
78K01 功能描述:SWITCH DIP DPDT 4 CIRCUIT RoHS:否 类别:开关 >> DIP 系列:78 特色产品:RDM Series Rotary DIP Switch 标准包装:70 系列:RDM 电路:十六进制 位置数:16 触点额定电压:0.1A @ 42VDC 触动器类型:用于工具旋转 触动器电平:凹槽式 安装类型:通孔 方向:顶部触动 可清洗:是 其它名称:EG4977-5RDMAR16PIT
78K01RAT 功能描述:SWITCH DIP RAISED SLIDE 1POS TH RoHS:是 类别:开关 >> DIP 系列:78 特色产品:RDM Series Rotary DIP Switch 标准包装:70 系列:RDM 电路:十六进制 位置数:16 触点额定电压:0.1A @ 42VDC 触动器类型:用于工具旋转 触动器电平:凹槽式 安装类型:通孔 方向:顶部触动 可清洗:是 其它名称:EG4977-5RDMAR16PIT
78K01S 制造商:Grayhill 功能描述:
78K01SRAT 功能描述:SWITCH DIP RAISED SLIDE 1POS TH RoHS:是 类别:开关 >> DIP 系列:78 特色产品:RDM Series Rotary DIP Switch 标准包装:70 系列:RDM 电路:十六进制 位置数:16 触点额定电压:0.1A @ 42VDC 触动器类型:用于工具旋转 触动器电平:凹槽式 安装类型:通孔 方向:顶部触动 可清洗:是 其它名称:EG4977-5RDMAR16PIT
78K01ST 功能描述:SWITCH DIP RAISED SLIDE 1POS TH RoHS:是 类别:开关 >> DIP 系列:78 特色产品:RDM Series Rotary DIP Switch 标准包装:70 系列:RDM 电路:十六进制 位置数:16 触点额定电压:0.1A @ 42VDC 触动器类型:用于工具旋转 触动器电平:凹槽式 安装类型:通孔 方向:顶部触动 可清洗:是 其它名称:EG4977-5RDMAR16PIT