diff --git a/eink_spi.hpp b/eink_spi.hpp
index b3e22ae..34a74d8 100644
--- a/eink_spi.hpp
+++ b/eink_spi.hpp
@@ -15,17 +15,26 @@ namespace eink {
 
 template <io::P SclPin, io::P SdaPin, io::P CsPin, io::P DcPin, std::uint32_t Freq = 100'000>
 class Spi {
+	template <std::uint32_t StaticClockCycles>
 	static constexpr double calcClockDelay()
 	{
-		// TODO: Verify static clock cycles
-		constexpr auto staticClockCycles = 10;
-		constexpr auto maxFrequency = F_CPU / staticClockCycles;
+		constexpr auto maxFrequency = F_CPU / StaticClockCycles;
 		static_assert(Freq <= maxFrequency, "SPI frequency not achievable using selected clock speed");
 		constexpr auto staticDelay = (1.0 * 1000 * 1000 / maxFrequency);
 		const auto delayUs = ((1.0 * 1000 * 1000 / Freq) - staticDelay) / 2;
 		return (delayUs > 0 ? delayUs : 0);
 	}
 
+	static constexpr double calcWriteClockDelay()
+	{
+		return calcClockDelay<8>();
+	}
+
+	static constexpr double calcReadClockDelay()
+	{
+		return calcClockDelay<5>();
+	}
+
 	static constexpr auto THREE_WIRE_SPI = (DcPin == io::P::NONE);
 
   public:
@@ -42,7 +51,7 @@ class Spi {
 		sm_dc.dir(io::Dir::OUT);
 	}
 
-	static void write(const word_t data, const bool command = true)
+	static void write(word_t data, const bool command = true)
 	{
 		constexpr auto numBits = THREE_WIRE_SPI ? 9 : 8;
 
@@ -66,10 +75,10 @@ class Spi {
 
 			    sm_sda = data >> bitPos & 1;
 
-			    _delay_us(DELAY_US);
+			    _delay_us(WRITE_DELAY_US);
 			    sm_scl.toggle();
 
-			    _delay_us(DELAY_US);
+			    _delay_us(WRITE_DELAY_US);
 			    sm_scl.toggle();
 		    },
 		    std::make_index_sequence<numBits>{});
@@ -85,9 +94,9 @@ class Spi {
 
 		if constexpr (THREE_WIRE_SPI) {
 			sm_sda = true;
-			_delay_us(DELAY_US);
+			_delay_us(READ_DELAY_US);
 			sm_scl.toggle();
-			_delay_us(DELAY_US);
+			_delay_us(READ_DELAY_US);
 			sm_scl.toggle();
 		}
 
@@ -102,13 +111,13 @@ class Spi {
 		    [&](const auto idx) {
 			    constexpr auto bitPos = numBits - idx.value - 1;
 
-			    _delay_us(DELAY_US);
+			    _delay_us(READ_DELAY_US);
 			    sm_scl.toggle();
 
 			    const auto receivedBit = sm_sda.read();
 			    res |= word_t{receivedBit} << bitPos;
 
-			    _delay_us(DELAY_US);
+			    _delay_us(READ_DELAY_US);
 			    sm_scl.toggle();
 		    },
 		    std::make_index_sequence<numBits>{});
@@ -129,7 +138,8 @@ class Spi {
 	static io::Pin<CsPin> sm_cs;
 	static io::Pin<DcPin> sm_dc;
 
-	static constexpr auto DELAY_US = calcClockDelay();
+	static constexpr auto WRITE_DELAY_US = calcWriteClockDelay();
+	static constexpr auto READ_DELAY_US = calcReadClockDelay();
 
 	static inline std::uint8_t disableInterrupts()
 	{