8N1 Serial Framing
Concept8N1 is the asynchronous serial framing scheme implemented by the UART RTL modules uart_tx.v and uart_rx.v. It consists of 1 start bit (LOW), 8 data bits transmitted LSB-first, an even parity bit, and 1 stop bit (HIGH), with baud rate controlled by a baud_div clock divider parameter.
First seen 8/6/2026
Last seen 8/6/2026
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Definition
8N1 serial framing refers to a standard asynchronous UART frame configuration: 1 start bit, 8 data bits, no parity handshake marker (here supplemented by an explicit even parity bit), and 1 stop bit. In the context of the related Verilog artifacts (uart_tx.v and uart_rx.v), the frame is concretely specified as:
- 1 start bit — logic LOW
- 8 data bits — transmitted LSB-first
- Even parity bit — one bit of even parity over the data payload
- 1 stop bit — logic HIGH
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[1] 8N1 serial framing consists of 1 start bit (LOW), 8 data bits LSB-first, even parity bit, 1 stop bit (HIGH). ConfigDrivenV: A Python-Integrated UVM Testbench for Automated RTL Verification with Self-Checking Scoreboard
[2] The UART DUT (uart_tx.v, uart_rx.v) implements 8N1 serial framing. ConfigDrivenV: A Python-Integrated UVM Testbench for Automated RTL Verification with Self-Checking Scoreboard
[3] Baud rate is controlled by the baud_div clock divider parameter. ConfigDrivenV: A Python-Integrated UVM Testbench for Automated RTL Verification with Self-Checking Scoreboard
[4] The testbench uses loopback topology connecting TX output directly to RX input. ConfigDrivenV: A Python-Integrated UVM Testbench for Automated RTL Verification with Self-Checking Scoreboard