參數(shù)資料
型號: 78078Y
廠商: NEC Corp.
英文描述: Common to 78K/0 Series
中文描述: 共同的78K / 0系列
文件頁數(shù): 15/129頁
文件大?。?/td> 644K
代理商: 78078Y
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.
相關PDF資料
PDF描述
78083 Common to 78K/0 Series
780924 Common to 78K/0 Series
780964 Common to 78K/0 Series
78098 Common to 78K/0 Series
78098B Common to 78K/0 Series
相關代理商/技術參數(shù)
參數(shù)描述
780790001 制造商:Molex 功能描述:1mm pit DDR3 DIMM PCB Skt Blk
78079-0001 功能描述:DDR3 / DDR2 / DDR 連接器 1.0MM DDR3 DIMM SKT 240P V TH 2.67TL AU RoHS:否 制造商:Molex 產(chǎn)品類型:DIMM 系列:78588 節(jié)距:1 mm 位置/觸點數(shù)量:240 安裝風格:Through Hole 安裝角:Vertical 外殼材料:Thermoplastic 觸點材料:Copper Alloy 觸點電鍍:Gold 電壓額定值:29 V 電流額定值:1 A 長度:
780790002 制造商:Molex 功能描述:
78079-0002 功能描述:DDR3 / DDR2 / DDR 連接器 1mm DDR3 DIMM VtTH O O/Lub .38AuLF 240Ckt RoHS:否 制造商:Molex 產(chǎn)品類型:DIMM 系列:78588 節(jié)距:1 mm 位置/觸點數(shù)量:240 安裝風格:Through Hole 安裝角:Vertical 外殼材料:Thermoplastic 觸點材料:Copper Alloy 觸點電鍍:Gold 電壓額定值:29 V 電流額定值:1 A 長度:
78079-0011 功能描述:DDR3 / DDR2 / DDR 連接器 1mm DDR3 DIMM VtTH / /Lub .76AuLF 240Ckt RoHS:否 制造商:Molex 產(chǎn)品類型:DIMM 系列:78588 節(jié)距:1 mm 位置/觸點數(shù)量:240 安裝風格:Through Hole 安裝角:Vertical 外殼材料:Thermoplastic 觸點材料:Copper Alloy 觸點電鍍:Gold 電壓額定值:29 V 電流額定值:1 A 長度: