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Introduction to Microprocessors and Microcomputers
The CPU and its FetchExecute Cycle
Bus Signal Timing and InputOutput Timing
11 other sections not shown
accumulator addr address bus Address Byte Label assembly language binary buffer bus lines Byte Label Instruction byte of data chip clock cycles clock pulses command register connected to port content of register control bus COUNT counter data bus DAV line decimal decremented delay program described diagram enable example executed flowchart function handshake data transfer hexadecimal high byte INITIALISE input handshake input port instruction in location Intel interrupt request interrupt routine interrupt signal INTR jump listed in table loaded location 2000H logic loop low byte main program mask memory location microcomputer mnemonic nested subroutines non-maskable interrupt opcode operation output handshake output port output voltage register pair result rotation RST 6.5 interrupt sequence shown in figure stack pointer status register stepper motor subroutine switch symbolic address timer waveform zero