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Finite State MachinesFinite State MachinesFinite State MachinesFinite State Machines

ASIC DESIGN USING FPGA

BEIT VII

KICSIT

May 10 2012 Lecture 31

May 10 2012 Lecture 31 2

UART as State MachineUART as State Machine

• UART top module consists of two modules, instanciated as uar_top (Receiver module)and uat_top ( Transmitter module).

• The Baud rate of the UART is 1200.• Hence the transmitter clock is generated as 1200 Hz.• And the Receiver clock is generated as 19200 Hz (1200 x 16),

16 times faster than Transmitter clock. • This is due to the fact that the Receiver module uses sampling

of the received bit stream of data from pc.• 8 samples of each bit are compared in order to ensure the bit

and hence reduce the error.

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UART as State MachineUART as State Machine

May 10 2012 Lecture 31

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State Machine Hardware State Machine Hardware

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