Waveforms, Read OPERATION-DATA BUS Buffer Register | Intel UPI-C42

UPI-C42/UPI-L42

WAVEFORMS

READ OPERATION—DATA BUS BUFFER REGISTER

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WRITE OPERATION—DATA BUS BUFFER REGISTER

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CLOCK TIMING

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Intel UPI-C42 Waveforms, Read OPERATION-DATA BUS Buffer Register, Write OPERATION-DATA BUS Buffer Register, Clock Timing

Contents

DIP Pin Configuration Pin Description UPI-C42/UPI-L42 Block Diagram UPI-C42/L42 Product Selection Guide UPI-C42 Low power Chmos version of the UPI-42Intel 82C42 UPI-L42 The low voltage 3.3V version of the UPI-C42 UPI-42 Compatible Features Bits of StatusIBF OBF Program Memory Bank Switch UPI-C42 FeaturesInterrupt Routines Suspend Suspend Mode Summary New Instructions NEW UPI-C42 InstructionsRDÝ, WRÝ XTAL1, XTAL2 Xtal Programming and Verifying the UPI-C42BUS Prog Verify Quick-Pulse Programming AlgorithmSecurity BIT Security BIT PROGRAMMING/ Verification Signature Mode Sync ModeVerification Access Code Applications Sync Mode Timing Diagrams UPI-C42 80-Column Matrix Printer Interface UPI-C42-8243 Keyboard Scanner RESET, SS XTAL2, ResetAbsolute Maximum Ratings UPI-C42 UPI-L42 DC Characteristics AC Characteristics DBB ReadDBB Write AC Characteristics DMA AC Characteristics PortClock AC Testing INPUT/OUTPUT Waveform AC Testing Load Circuit AC CHARACTERISTICS-PROGRAMMING UPI-C42 and UPI-L42 Driving from AN External Source LC Oscillator Mode Crystal Oscillator Mode Read OPERATION-DATA BUS Buffer Register WaveformsWrite OPERATION-DATA BUS Buffer Register Clock Timing Combination PROGRAM/VERIFY Mode Verify ModeWaveforms Port Timing During External Access EA DMAPort Accumulator UPI Instruction Set Jmpp @A Revision Summary