Given in the following diagram is a simple 8284A clock generator circuit that uses a 15MHz crystal input. Calculate the corresponding CLK and PCLK frequency.
8284A with 15Mhz crystal diagram
Answer
CLK = 33% crystal/EFI = 0.33 (15Mhz) = 5 Mhz
PCLK = 50% crystal/EFI = 0.5 (15Mhz) = 7.5Mhz
a mistake in the peripheral clock formula, should be
ReplyDeletePCLK = 50% CLK = 0.5 (5Mhz) = 2.5Mhz