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spi.dig
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spi.dig
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<?xml version="1.0" encoding="utf-8"?>
<circuit>
<version>2</version>
<attributes/>
<visualElements>
<visualElement>
<elementName>74299.dig</elementName>
<elementAttributes>
<entry>
<string>shapeType</string>
<shapeType>SIMPLE</shapeType>
</entry>
</elementAttributes>
<pos x="1300" y="320"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>MISO</string>
</entry>
<entry>
<string>InDefault</string>
<value v="1" z="false"/>
</entry>
</elementAttributes>
<pos x="1740" y="740"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>Label</string>
<string>MOSI</string>
</entry>
</elementAttributes>
<pos x="1740" y="340"/>
</visualElement>
<visualElement>
<elementName>Driver</elementName>
<elementAttributes>
<entry>
<string>Bits</string>
<int>8</int>
</entry>
</elementAttributes>
<pos x="140" y="300"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>D7</string>
</entry>
</elementAttributes>
<pos x="-40" y="660"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>D6</string>
</entry>
</elementAttributes>
<pos x="-40" y="640"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>D5</string>
</entry>
</elementAttributes>
<pos x="-40" y="620"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>D4</string>
</entry>
</elementAttributes>
<pos x="-40" y="600"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>D3</string>
</entry>
</elementAttributes>
<pos x="-40" y="580"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>D2</string>
</entry>
</elementAttributes>
<pos x="-40" y="560"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>D1</string>
</entry>
</elementAttributes>
<pos x="-40" y="540"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>D0</string>
</entry>
</elementAttributes>
<pos x="-40" y="520"/>
</visualElement>
<visualElement>
<elementName>Splitter</elementName>
<elementAttributes>
<entry>
<string>mirror</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Input Splitting</string>
<string>8</string>
</entry>
<entry>
<string>Output Splitting</string>
<string>1,1,1,1,1,1,1,1</string>
</entry>
</elementAttributes>
<pos x="60" y="520"/>
</visualElement>
<visualElement>
<elementName>Driver</elementName>
<elementAttributes>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Bits</string>
<int>8</int>
</entry>
<entry>
<string>flipSelPos</string>
<boolean>true</boolean>
</entry>
</elementAttributes>
<pos x="220" y="520"/>
</visualElement>
<visualElement>
<elementName>Splitter</elementName>
<elementAttributes>
<entry>
<string>Input Splitting</string>
<string>1,1,1,1,1,1,1,1</string>
</entry>
</elementAttributes>
<pos x="40" y="300"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>addValueToGraph</string>
<boolean>false</boolean>
</entry>
<entry>
<string>Label</string>
<string>DRIVE</string>
</entry>
</elementAttributes>
<pos x="120" y="240"/>
</visualElement>
<visualElement>
<elementName>Not</elementName>
<elementAttributes>
<entry>
<string>rotation</string>
<rotation rotation="3"/>
</entry>
</elementAttributes>
<pos x="220" y="420"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>Label</string>
<string>~RD</string>
</entry>
<entry>
<string>InDefault</string>
<value v="1" z="false"/>
</entry>
</elementAttributes>
<pos x="500" y="400"/>
</visualElement>
<visualElement>
<elementName>Rectangle</elementName>
<elementAttributes>
<entry>
<string>RectHeight</string>
<int>33</int>
</entry>
<entry>
<string>Label</string>
<string>MPU</string>
</entry>
<entry>
<string>RectWidth</string>
<int>22</int>
</entry>
</elementAttributes>
<pos x="-120" y="120"/>
</visualElement>
<visualElement>
<elementName>Not</elementName>
<elementAttributes/>
<pos x="740" y="360"/>
</visualElement>
<visualElement>
<elementName>VDD</elementName>
<elementAttributes/>
<pos x="1280" y="280"/>
</visualElement>
<visualElement>
<elementName>Ground</elementName>
<elementAttributes>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
</elementAttributes>
<pos x="1260" y="680"/>
</visualElement>
<visualElement>
<elementName>Rectangle</elementName>
<elementAttributes>
<entry>
<string>RectHeight</string>
<int>25</int>
</entry>
<entry>
<string>Label</string>
<string>Buffers (for proper simulation)</string>
</entry>
<entry>
<string>RectWidth</string>
<int>18</int>
</entry>
</elementAttributes>
<pos x="-80" y="200"/>
</visualElement>
<visualElement>
<elementName>VDD</elementName>
<elementAttributes/>
<pos x="900" y="740"/>
</visualElement>
<visualElement>
<elementName>Ground</elementName>
<elementAttributes>
<entry>
<string>rotation</string>
<rotation reference="../../../../visualElement[22]/elementAttributes/entry/rotation"/>
</entry>
</elementAttributes>
<pos x="920" y="1000"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>rotation</string>
<rotation rotation="2"/>
</entry>
<entry>
<string>Label</string>
<string>~BUSY</string>
</entry>
</elementAttributes>
<pos x="560" y="1100"/>
</visualElement>
<visualElement>
<elementName>Not</elementName>
<elementAttributes>
<entry>
<string>rotation</string>
<rotation rotation="3"/>
</entry>
</elementAttributes>
<pos x="840" y="240"/>
</visualElement>
<visualElement>
<elementName>Text</elementName>
<elementAttributes>
<entry>
<string>textFontSize</string>
<int>20</int>
</entry>
<entry>
<string>Description</string>
<string>If ~BUSY is active, new data cannot be written to SPI.
~BUSY must be memory-mapped somewhere.
If '173 is used for MOSI flip-flop, then one
of its quarters can be used here to tri-state ~BUSY.</string>
</entry>
</elementAttributes>
<pos x="180" y="920"/>
</visualElement>
<visualElement>
<elementName>Out</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>Label</string>
<string>SCK</string>
</entry>
</elementAttributes>
<pos x="1740" y="200"/>
</visualElement>
<visualElement>
<elementName>And</elementName>
<elementAttributes>
<entry>
<string>wideShape</string>
<boolean>true</boolean>
</entry>
</elementAttributes>
<pos x="1560" y="180"/>
</visualElement>
<visualElement>
<elementName>Not</elementName>
<elementAttributes/>
<pos x="1260" y="860"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
</elementAttributes>
<pos x="-40" y="320"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>InDefault</string>
<value v="1" z="false"/>
</entry>
</elementAttributes>
<pos x="-40" y="340"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>InDefault</string>
<value v="1" z="false"/>
</entry>
</elementAttributes>
<pos x="-40" y="360"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
</elementAttributes>
<pos x="-40" y="400"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
</elementAttributes>
<pos x="-40" y="440"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>InDefault</string>
<value reference="../../../../visualElement[33]/elementAttributes/entry[2]/value"/>
</entry>
</elementAttributes>
<pos x="-40" y="380"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
</elementAttributes>
<pos x="-40" y="420"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>InDefault</string>
<value reference="../../../../visualElement[33]/elementAttributes/entry[2]/value"/>
</entry>
</elementAttributes>
<pos x="-40" y="300"/>
</visualElement>
<visualElement>
<elementName>Data</elementName>
<elementAttributes>
<entry>
<string>maxStepCount</string>
<int>64</int>
</entry>
</elementAttributes>
<pos x="1400" y="920"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>Label</string>
<string>~EN</string>
</entry>
<entry>
<string>InDefault</string>
<value v="1" z="false"/>
</entry>
</elementAttributes>
<pos x="500" y="340"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>Label</string>
<string>Ф2</string>
</entry>
</elementAttributes>
<pos x="500" y="180"/>
</visualElement>
<visualElement>
<elementName>Text</elementName>
<elementAttributes>
<entry>
<string>textFontSize</string>
<int>20</int>
</entry>
<entry>
<string>Description</string>
<string>Ф2 must go low before ~WR is deactivated to correctly latch data.</string>
</entry>
</elementAttributes>
<pos x="600" y="-20"/>
</visualElement>
<visualElement>
<elementName>Testcase</elementName>
<elementAttributes>
<entry>
<string>Testdata</string>
<testData>
<dataString># Reset
~RES DRIVE Ф2 ~EN ~WR ~RD MISO SCK MOSI ~BUSY D0 D1 D2 D3 D4 D5 D6 D7
1 0 0 1 1 1 0 X X X X X X X X X X X
0 0 0 1 1 1 0 X X X X X X X X X X X
0 0 1 1 1 1 0 X X X X X X X X X X X
0 0 0 1 1 1 0 X X X X X X X X X X X
1 0 0 1 1 1 0 0 0 X X X X X X X X X
# Dummy Ф2 cycle
1 0 0 1 1 1 0 0 0 1 X X X X X X X X
1 0 1 1 1 1 0 0 0 1 X X X X X X X X
# SPI device CS should be asserted here.
# Write to buffer
1 0 0 1 1 1 0 0 0 1 X X X X X X X X
1 1 0 0 0 1 0 0 0 1 X X X X X X X X
1 1 1 0 0 1 0 0 0 1 X X X X X X X X
1 1 0 0 0 1 0 0 0 0 X X X X X X X X
1 0 0 1 1 1 0 0 0 0 X X X X X X X X
# Send 00011101, receive 11100010
# Transfer bit 7
1 0 1 1 1 1 1 1 0 0 X X X X X X X X
# Receive bit 7
1 0 0 1 1 1 1 0 0 0 X X X X X X X X
# Transfer bit 6
1 0 1 1 1 1 1 1 0 0 X X X X X X X X
# Receive bit 6
1 0 0 1 1 1 1 0 0 0 X X X X X X X X
# Transfer bit 5
1 0 1 1 1 1 1 1 0 0 X X X X X X X X
# Receive bit 5
1 0 0 1 1 1 1 0 1 0 X X X X X X X X
# Transfer bit 4
1 0 1 1 1 1 0 1 1 0 X X X X X X X X
# Receive bit 4
1 0 0 1 1 1 0 0 1 0 X X X X X X X X
# Transfer bit 3
1 0 1 1 1 1 0 1 1 0 X X X X X X X X
# Receive bit 3
1 0 0 1 1 1 0 0 1 0 X X X X X X X X
# Transfer bit 2
1 0 1 1 1 1 0 1 1 0 X X X X X X X X
# Receive bit 2
1 0 0 1 1 1 0 0 0 0 X X X X X X X X
# Transfer bit 1
1 0 1 1 1 1 1 1 0 0 X X X X X X X X
# Receive bit 1
1 0 0 1 1 1 1 0 1 0 X X X X X X X X
# Transfer bit 0
1 0 1 1 1 1 0 1 1 0 X X X X X X X X
# Receive bit 0, back to not busy
1 0 0 1 1 1 0 0 1 1 X X X X X X X X
# Verify received byte
1 0 0 0 1 0 0 0 1 1 0 1 0 0 0 1 1 1
# SPI device CS should be deasserted here.
</dataString>
</testData>
</entry>
</elementAttributes>
<pos x="1960" y="840"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>Label</string>
<string>~WR</string>
</entry>
<entry>
<string>InDefault</string>
<value v="1" z="false"/>
</entry>
</elementAttributes>
<pos x="500" y="280"/>
</visualElement>
<visualElement>
<elementName>74163.dig</elementName>
<elementAttributes>
<entry>
<string>shapeType</string>
<shapeType>SIMPLE</shapeType>
</entry>
</elementAttributes>
<pos x="1000" y="780"/>
</visualElement>
<visualElement>
<elementName>In</elementName>
<elementAttributes>
<entry>
<string>small</string>
<boolean>true</boolean>
</entry>
<entry>
<string>Label</string>
<string>~RES</string>
</entry>
<entry>
<string>InDefault</string>
<value v="1" z="false"/>
</entry>
</elementAttributes>
<pos x="500" y="780"/>
</visualElement>
<visualElement>
<elementName>Or</elementName>
<elementAttributes>
<entry>
<string>wideShape</string>
<boolean>true</boolean>
</entry>
</elementAttributes>
<pos x="560" y="280"/>
</visualElement>
<visualElement>
<elementName>Or</elementName>
<elementAttributes>
<entry>
<string>wideShape</string>
<boolean>true</boolean>
</entry>
</elementAttributes>
<pos x="560" y="360"/>
</visualElement>
<visualElement>
<elementName>BusSplitter</elementName>
<elementAttributes>
<entry>
<string>Bits</string>
<int>8</int>
</entry>
</elementAttributes>
<pos x="1100" y="520"/>
</visualElement>
<visualElement>
<elementName>Text</elementName>
<elementAttributes>
<entry>
<string>textFontSize</string>
<int>20</int>
</entry>
<entry>
<string>Description</string>
<string>On startup, ~RES must be asserted for at least one full Ф2 cycle.</string>
</entry>
</elementAttributes>
<pos x="600" y="20"/>
</visualElement>
</visualElements>
<wires>
<wire>
<p1 x="900" y="960"/>
<p2 x="1000" y="960"/>
</wire>
<wire>
<p1 x="-40" y="320"/>
<p2 x="40" y="320"/>
</wire>
<wire>
<p1 x="540" y="320"/>
<p2 x="560" y="320"/>
</wire>
<wire>
<p1 x="1240" y="320"/>
<p2 x="1300" y="320"/>
</wire>
<wire>
<p1 x="1120" y="640"/>
<p2 x="1300" y="640"/>
</wire>
<wire>
<p1 x="-40" y="640"/>
<p2 x="40" y="640"/>
</wire>
<wire>
<p1 x="-40" y="580"/>
<p2 x="40" y="580"/>
</wire>
<wire>
<p1 x="1120" y="580"/>
<p2 x="1300" y="580"/>
</wire>
<wire>
<p1 x="920" y="900"/>
<p2 x="1000" y="900"/>
</wire>
<wire>
<p1 x="-40" y="520"/>
<p2 x="40" y="520"/>
</wire>
<wire>
<p1 x="60" y="520"/>
<p2 x="200" y="520"/>
</wire>
<wire>
<p1 x="1120" y="520"/>
<p2 x="1300" y="520"/>
</wire>
<wire>
<p1 x="240" y="520"/>
<p2 x="260" y="520"/>
</wire>
<wire>
<p1 x="260" y="520"/>
<p2 x="1100" y="520"/>
</wire>
<wire>
<p1 x="1100" y="840"/>
<p2 x="1140" y="840"/>
</wire>
<wire>
<p1 x="900" y="840"/>
<p2 x="1000" y="840"/>
</wire>
<wire>
<p1 x="1640" y="200"/>
<p2 x="1740" y="200"/>
</wire>
<wire>
<p1 x="560" y="1100"/>
<p2 x="1220" y="1100"/>
</wire>
<wire>
<p1 x="500" y="780"/>
<p2 x="580" y="780"/>
</wire>
<wire>
<p1 x="580" y="780"/>
<p2 x="1000" y="780"/>
</wire>
<wire>
<p1 x="1260" y="460"/>
<p2 x="1300" y="460"/>
</wire>
<wire>
<p1 x="1260" y="400"/>
<p2 x="1300" y="400"/>
</wire>
<wire>
<p1 x="-40" y="400"/>
<p2 x="40" y="400"/>
</wire>
<wire>
<p1 x="500" y="400"/>
<p2 x="560" y="400"/>
</wire>
<wire>
<p1 x="800" y="1040"/>
<p2 x="1340" y="1040"/>
</wire>
<wire>
<p1 x="1400" y="340"/>
<p2 x="1740" y="340"/>
</wire>
<wire>
<p1 x="500" y="340"/>
<p2 x="540" y="340"/>
</wire>
<wire>
<p1 x="-40" y="340"/>
<p2 x="40" y="340"/>
</wire>
<wire>
<p1 x="1280" y="340"/>
<p2 x="1300" y="340"/>
</wire>
<wire>
<p1 x="920" y="980"/>
<p2 x="1000" y="980"/>
</wire>
<wire>
<p1 x="-40" y="660"/>
<p2 x="40" y="660"/>
</wire>
<wire>
<p1 x="1120" y="660"/>
<p2 x="1300" y="660"/>
</wire>
<wire>
<p1 x="920" y="920"/>
<p2 x="1000" y="920"/>
</wire>
<wire>
<p1 x="-40" y="600"/>
<p2 x="40" y="600"/>
</wire>
<wire>
<p1 x="1120" y="600"/>
<p2 x="1300" y="600"/>
</wire>
<wire>
<p1 x="500" y="280"/>
<p2 x="560" y="280"/>
</wire>
<wire>
<p1 x="800" y="860"/>
<p2 x="1000" y="860"/>
</wire>
<wire>
<p1 x="1300" y="860"/>
<p2 x="1340" y="860"/>
</wire>
<wire>
<p1 x="1100" y="860"/>
<p2 x="1220" y="860"/>
</wire>
<wire>
<p1 x="1220" y="860"/>
<p2 x="1260" y="860"/>
</wire>
<wire>
<p1 x="1340" y="860"/>
<p2 x="1520" y="860"/>
</wire>
<wire>
<p1 x="1520" y="220"/>
<p2 x="1560" y="220"/>
</wire>
<wire>
<p1 x="-40" y="540"/>
<p2 x="40" y="540"/>
</wire>
<wire>
<p1 x="1120" y="540"/>
<p2 x="1300" y="540"/>
</wire>
<wire>
<p1 x="180" y="540"/>
<p2 x="1100" y="540"/>
</wire>
<wire>
<p1 x="700" y="800"/>
<p2 x="1000" y="800"/>
</wire>
<wire>
<p1 x="1100" y="800"/>
<p2 x="1140" y="800"/>
</wire>
<wire>
<p1 x="1280" y="480"/>
<p2 x="1300" y="480"/>
</wire>
<wire>
<p1 x="-40" y="420"/>
<p2 x="40" y="420"/>
</wire>
<wire>
<p1 x="840" y="420"/>
<p2 x="1300" y="420"/>
</wire>
<wire>
<p1 x="1240" y="740"/>
<p2 x="1740" y="740"/>
</wire>
<wire>
<p1 x="700" y="360"/>
<p2 x="740" y="360"/>
</wire>
<wire>
<p1 x="780" y="360"/>
<p2 x="1300" y="360"/>
</wire>
<wire>
<p1 x="-40" y="360"/>
<p2 x="40" y="360"/>
</wire>
<wire>
<p1 x="540" y="360"/>
<p2 x="560" y="360"/>
</wire>
<wire>
<p1 x="900" y="940"/>
<p2 x="1000" y="940"/>
</wire>
<wire>
<p1 x="60" y="300"/>
<p2 x="120" y="300"/>
</wire>
<wire>
<p1 x="160" y="300"/>
<p2 x="260" y="300"/>
</wire>
<wire>
<p1 x="-40" y="300"/>
<p2 x="40" y="300"/>
</wire>
<wire>
<p1 x="640" y="300"/>