diff --git a/firmware/application/portapack.cpp b/firmware/application/portapack.cpp
index 67ee181f..1491fe6a 100644
--- a/firmware/application/portapack.cpp
+++ b/firmware/application/portapack.cpp
@@ -27,7 +27,6 @@
 #include "hackrf_gpio.hpp"
 using namespace hackrf::one;
 
-#include "si5351.hpp"
 #include "clock_manager.hpp"
 
 #include "i2c_pp.hpp"
diff --git a/firmware/application/portapack.hpp b/firmware/application/portapack.hpp
index 939442de..ae424f36 100644
--- a/firmware/application/portapack.hpp
+++ b/firmware/application/portapack.hpp
@@ -25,6 +25,7 @@
 
 #include "spi_pp.hpp"
 #include "wm8731.hpp"
+#include "si5351.hpp"
 #include "lcd_ili9341.hpp"
 
 #include "radio.hpp"
@@ -40,6 +41,8 @@ extern SPI ssp1;
 
 extern wolfson::wm8731::WM8731 audio_codec;
 
+extern si5351::Si5351 clock_generator;
+
 extern ReceiverModel receiver_model;
 
 void init();
diff --git a/firmware/application/ui_debug.cpp b/firmware/application/ui_debug.cpp
index 98d52e91..fd7b9ecd 100644
--- a/firmware/application/ui_debug.cpp
+++ b/firmware/application/ui_debug.cpp
@@ -155,6 +155,54 @@ void DebugRFFC5072RegistersWidget::draw_values(
 	}
 }
 
+/* DebugSi5351CRegistersWidget ******************************************/
+
+void DebugSi5351CRegistersWidget::update() {
+	set_dirty();
+}
+
+void DebugSi5351CRegistersWidget::paint(Painter& painter) {
+	draw_legend(painter);
+
+	draw_values(painter, portapack::clock_generator);
+}
+
+void DebugSi5351CRegistersWidget::draw_legend(Painter& painter) {
+	for(size_t i=0; i<registers_count; i+=registers_per_row) {
+		const Point offset {
+			0, static_cast<Coord>((i / registers_per_row) * row_height)
+		};
+
+		const auto text = to_string_hex(i, legend_length);
+		painter.draw_string(
+			screen_pos() + offset,
+			style(),
+			text
+		);
+	}
+}
+
+void DebugSi5351CRegistersWidget::draw_values(
+	Painter& painter,
+	si5351::Si5351& device
+) {
+	for(size_t i=0; i<registers_count; i++) {
+		const Point offset = {
+			static_cast<Coord>(legend_width + 8 + (i % registers_per_row) * (value_width + 8)),
+			static_cast<Coord>((i / registers_per_row) * row_height)
+		};
+
+		const auto value = device.read_register(i);
+
+		const auto text = to_string_hex(value, value_length);
+		painter.draw_string(
+			screen_pos() + offset,
+			style(),
+			text
+		);
+	}
+}
+
 /* DebugMenuView *********************************************************/
 
 DebugMenuView::DebugMenuView(NavigationView& nav) {
@@ -164,7 +212,7 @@ DebugMenuView::DebugMenuView(NavigationView& nav) {
 		{ "SD Card",     [&nav](){ nav.push(new NotImplementedView { nav }); } },
 		{ "RFFC5072",    [&nav](){ nav.push(new DebugRFFC5072View  { nav }); } },
 		{ "MAX2837",     [&nav](){ nav.push(new DebugMAX2837View   { nav }); } },
-		{ "Si5351C",     [&nav](){ nav.push(new NotImplementedView { nav }); } },
+		{ "Si5351C",     [&nav](){ nav.push(new DebugSi5351CView   { nav }); } },
 		{ "WM8731",      [&nav](){ nav.push(new NotImplementedView { nav }); } },
 	} });
 	on_left = [&nav](){ nav.pop(); };
diff --git a/firmware/application/ui_debug.hpp b/firmware/application/ui_debug.hpp
index 16906ccd..68871b3c 100644
--- a/firmware/application/ui_debug.hpp
+++ b/firmware/application/ui_debug.hpp
@@ -30,6 +30,7 @@
 
 #include "rffc507x.hpp"
 #include "max2837.hpp"
+#include "portapack.hpp"
 
 namespace ui {
 
@@ -152,6 +153,40 @@ private:
 	void draw_values(Painter& painter, const max2837::RegisterMap registers);
 };
 
+class DebugSi5351CRegistersWidget : public Widget {
+public:
+	constexpr DebugSi5351CRegistersWidget(
+		Rect parent_rect
+	) : Widget { parent_rect }
+	{
+	}
+
+	void update();
+
+	void paint(Painter& painter) override;
+
+	static constexpr const char* const name = "Si5351C";
+
+private:
+	static constexpr size_t registers_count = 96;
+
+	static constexpr size_t legend_length = 2;
+	static constexpr Dim legend_width = legend_length * 8;
+
+	static constexpr size_t value_length = 2;
+	static constexpr Dim value_width = value_length * 8;
+
+	static constexpr size_t registers_per_row = 8;
+	static constexpr size_t registers_row_length = (registers_per_row * (value_length + 1)) - 1;
+	static constexpr Dim registers_row_width = registers_row_length * 8;
+
+	static constexpr size_t rows = registers_count / registers_per_row;
+	static constexpr Dim row_height = 16;
+
+	void draw_legend(Painter& painter);
+	void draw_values(Painter& painter, si5351::Si5351& device);
+};
+
 template<class RegistersWidget>
 class RegistersView : public View {
 public:
@@ -180,22 +215,23 @@ private:
 	};
 
 	RegistersWidget widget_registers {
-		{ 32, 48, 176, 128 }
+		{ 0, 48, 240, 192 }
 	};
 
 	Button button_update {
-		{ 16, 192, 96, 24 },
+		{ 16, 256, 96, 24 },
 		"Update"
 	};
 
 	Button button_done {
-		{ 128, 192, 96, 24 },
+		{ 128, 256, 96, 24 },
 		"Done"
 	};
 };
 
 using DebugRFFC5072View = RegistersView<DebugRFFC5072RegistersWidget>;
 using DebugMAX2837View = RegistersView<DebugMAX2837RegistersWidget>;
+using DebugSi5351CView = RegistersView<DebugSi5351CRegistersWidget>;
 
 class DebugMenuView : public MenuView {
 public: