参数资料
型号: UPD178F054
英文描述: 78K/0 Series for Instructions | User's Manual[10/2001]
中文描述: 78K线/ 0系列说明|用户手册[10/2001]
文件页数: 36/129页
文件大小: 644K
代理商: UPD178F054
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
70
IE
Z
RBS1
AC
RBS0
0
ISP
CY
相关PDF资料
PDF描述
UPD178F124 78K/0 Series for Instructions | User's Manual[10/2001]
UPD178F098GF-3BA-A 8-BIT, FLASH, MICROCONTROLLER, PQFP100
UPD17P136BGT MICROCONTROLLER, PDSO28
UPD1913C Consumer IC
UPD1943G Consumer IC
相关代理商/技术参数
参数描述
UPD178F098 制造商:NEC 制造商全称:NEC 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLER
UPD178F098GF-3BA 制造商:NEC 制造商全称:NEC 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLER
UPD178F124 制造商:未知厂家 制造商全称:未知厂家 功能描述:78K/0 Series for Instructions | User's Manual[10/2001]
UPD178F124GC8BT 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller
UPD178F124GF3B9 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller