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187:. Most SPI master nodes can set the clock polarity (CPOL) and clock phase (CPHA) with respect to the data. This timing diagram shows the clock for both values of CPOL and the values for the two data lines (MISO & MOSI) for each value of CPHA. Note that when CPHA=1, then the data is delayed by one-half clock cycle.
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represents a set of signals in the time domain. A timing diagram can contain many rows, usually one of them being the clock. It is a tool commonly used in digital electronics, hardware debugging, and digital communications. Besides providing an overall description of the timing relationships, the
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When a slave's SS line is high, both its MISO and MOSI line should be high impedance to avoid disrupting a transfer to a different slave. Before SS being pulled low, the MISO & MOSI lines are indicated with a "z" for high impedance. Also, before the SS is pulled low, the "cycle #" row is
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Note that for CPHA=1, the MISO & MOSI lines are undefined until after the first clock edge and are also shown greyed out before that.
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A more typical timing diagram has just a single clock and numerous data lines.
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A slot showing a high and low is an either-or (such as on a data line)
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The following diagram software may be used to draw timing diagrams:
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digital timing diagram can help find and diagnose digital logic
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The master writes on the MOSI line and reads the MISO line
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The master determines an appropriate CPOL & CPHA value
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The slave writes on the MISO line and reads the MOSI line
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During each of the eight clock cycles, the transfer is
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The timing diagram example on the right describes the
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Most timing diagrams use the following conventions:
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51:. Unsourced material may be challenged and removed.
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111:Learn how and when to remove this message
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185:Serial Peripheral Interface (SPI) Bus
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471:Three-dimensional integrated circuit
49:adding citations to reliable sources
332:is an online timing diagram editor.
201:(SS) line for a specific slave chip
190:SPI operates in the following way:
16:Diagram that shows events over time
483:Erasable programmable logic device
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518:Complex programmable logic device
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530:Field-programmable object array
466:Mixed-signal integrated circuit
178:Serial Peripheral Interface Bus
36:needs additional citations for
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656:Hardware description language
524:Field-programmable gate array
668:Formal equivalence checking
147:Lower value is a logic zero
144:Higher value is a logic one
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688:Hierarchical state machine
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197:The master pulls down the
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574:Logic in computer science
500:Programmable logic device
460:Hybrid integrated circuit
176:A timing diagram for the
601:Switching circuit theory
506:Programmable Array Logic
494:Programmable logic array
60:"Digital timing diagram"
651:Register-transfer level
168:Example: SPI bus timing
159:A greyed out slot is a
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125:digital timing diagram
757:Electronic literature
711:Hardware acceleration
579:Computer architecture
477:Emitter-coupled logic
414:Printed circuit board
338:has a Windows binary.
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683:Finite-state machine
661:High-level synthesis
596:Circuit minimization
45:improve this article
730:Digital photography
512:Generic Array Logic
434:Combinational logic
409:Printed electronics
373:Digital electronics
678:Asynchronous logic
454:Integrated circuit
419:Electronic circuit
302:"TimingDiagrammer"
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101:February 2024
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699:Applications
309:. Retrieved
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43:Please help
38:verification
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429:Memory cell
311:10 February
286:10 February
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793:Categories
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404:Capacitor
799:Diagrams
399:Inductor
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330:Wavedrom
280:PlantUML
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241:Software
639:Routing
473:(3D IC)
130:hazards
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538:(ASIC)
532:(FPOA)
526:(FPGA)
520:(CPLD)
485:(EPLD)
306:GitHub
282:. 2024
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267:^
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