参数资料
型号: 780001
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: 14/129页
文件大小: 644K
代理商: 780001
14
User's Manual U12326EJ4V0UM
CHAPTER 2 REGISTERS
2.1 Control Registers
The control registers control the program sequence, statuses and stack memory. A program counter, a program
status word and a stack pointer are the control registers.
2.1.1 Program counter (PC)
The program counter is a 16-bit register that holds the address information of the next program to be executed.
In normal operation, the PC is automatically incremented according to the number of bytes of the instruction
to be fetched. When a branch instruction is executed, immediate data and register contents are set.
RESET input sets the reset vector table values at addresses 0000H and 0001H to the program counter.
Figure 2-1. Program Counter Configuration
2.1.2 Program status word (PSW)
The program status word is an 8-bit register consisting of various flags to be set/reset by instruction execution.
Program status word contents are automatically stacked upon interrupt request generation or PUSH PSW
instruction execution and are automatically reset upon execution of the RETB, RETI and POP PSW instructions.
RESET input sets the PSW to 02H.
Figure 2-2. Program Status Word Configuration
15
0
PC
7
0
IE
Z
RBS1
AC
RBS0
0
ISP
CY
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相关代理商/技术参数
参数描述
780-001 制造商:EDDING 功能描述:BLACK EXTRAFINE PAINT PEN
780001 BK001 制造商:Alpha Wire 功能描述:HOOK-UP STRND 1/0 AWG BLK 1000'
780001 BK002 制造商:ALPHA DEARBORN 功能描述:Wire, Hook-Up; 1/0 AWG; 1045/30; 0.082 in.; 0.589 in.; 600 V; Black
780001 BK005 制造商:Alpha Wire 功能描述:HOOK-UP STRND 1/0 AWG BLACK 100' 制造商:Belden Inc 功能描述:780001 BLACK 100 FT
780001 BL001 制造商:Alpha Wire 功能描述:HOOK-UP STRND 1/0 AWG BLUE 1000'