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							<span class="px-3 py-1 bg-yellow-600/20 text-yellow-300 text-sm rounded-full">SPI Protocol</span>
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							SPI Protocol API
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						<p class="text-xl text-gray-400">
							SPI master operations with multiple chip select support and automatic pin reservation
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								The SPI Protocol API provides full SPI master support with automatic pin reservation and multiple chip select management. 
								PoKeys devices support 31-33 chip select capable pins depending on the model.
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									<h3 class="text-lg font-semibold mb-2 text-yellow-400">Key Features</h3>
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										<li>• Full SPI master support</li>
										<li>• Multiple chip select pins (31-33 per device)</li>
										<li>• Automatic pin reservation (MOSI, CLK)</li>
										<li>• Configurable clock speed and mode</li>
										<li>• Hardware constraint enforcement</li>
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										<li>• <strong>Pin 23 (MOSI)</strong> - Master Out Slave In</li>
										<li>• <strong>Pin 24 (MISO)</strong> - Master In Slave Out</li>
										<li>• <strong>Pin 25 (CLK)</strong> - Clock signal</li>
										<li>• <strong>CS Pins</strong> - Various pins support chip select</li>
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						<h2 class="text-2xl font-bold mb-6 text-white">Automatic Pin Reservation</h2>
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							<h3 class="text-red-400 font-semibold mb-3">Important: Hardware Constraints</h3>
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								<li>• <strong>Pin 23 (MOSI)</strong> and <strong>Pin 25 (CLK)</strong> are automatically reserved when SPI is enabled</li>
								<li>• These pins cannot be used for other functions while SPI is active</li>
								<li>• Configuration validation prevents conflicts</li>
								<li>• Use <code>is_pin_capability_supported()</code> to check CS pin availability</li>
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						<h2 class="text-2xl font-bold mb-6 text-white">Basic SPI Operations</h2>
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								<h4 class="font-semibold text-yellow-400 mb-2">Example Usage</h4>
								<pre class="text-gray-300"><code>use pokeys_lib::*;

fn main() -> Result&lt;()&gt; {`{`}
    let mut device = connect_to_device(0)?;

    // Initialize SPI (automatically reserves pins 23 and 25)
    device.spi_init()?;

    // Configure chip select pin
    let cs_pin = 10;
    device.validate_pin_capability(cs_pin, "SPI_CS")?;

    // SPI transaction
    let tx_data = vec![0x01, 0x02, 0x03];
    let rx_data = device.spi_transfer(cs_pin, &tx_data)?;

    println!(\"Received: {`{`}:?{`}`}\", rx_data);
    Ok(())
{`}`}</code></pre>
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										<th class="text-left py-2 text-yellow-400">Device Model</th>
										<th class="text-left py-2 text-orange-400">Total Pins</th>
										<th class="text-left py-2 text-green-400">CS Capable Pins</th>
										<th class="text-left py-2 text-blue-400">Reserved Pins</th>
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										<td class="py-2 font-semibold">PoKeys56U/56E</td>
										<td class="py-2">55</td>
										<td class="py-2">31</td>
										<td class="py-2">23 (MOSI), 25 (CLK)</td>
									</tr>
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										<td class="py-2 font-semibold">PoKeys57U/57E</td>
										<td class="py-2">57</td>
										<td class="py-2">33</td>
										<td class="py-2">23 (MOSI), 25 (CLK)</td>
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						<h2 class="text-2xl font-bold mb-4 text-white">Best Practices</h2>
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									<h3 class="text-lg font-semibold mb-2 text-green-400">Pin Planning</h3>
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										<li>• Reserve pins 23 and 25 for SPI before other pin assignments</li>
										<li>• Validate CS pin capability before configuration</li>
										<li>• Plan peripheral connections based on available CS pins</li>
									</ul>
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									<h3 class="text-lg font-semibold mb-2 text-blue-400">Performance</h3>
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										<li>• Use appropriate clock speeds for your peripherals</li>
										<li>• Minimize CS transitions for better performance</li>
										<li>• Consider using bulk transfers for large data</li>
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