Lexmark C530DN Technical Reference - Page 338

8-22 Interfaces Start and Stop Bits The printer receives data with 1 start bit and either 1 or 2 stop bits. The printer always sends 1 start and 2 stop bits. Parity There are four possible parity settings: Odd, Even, None, and Ignore. Odd Even None Ignore The port expects to receive data frames with an odd number of logical 1's per byte. The printer transmits XOFF and XON with odd parity. If the printer detects a parity error, the port sends X'5F' to the printer instead of the character sent by the host system. The port expects to receive data frames with an even number of logical 1's per byte. The port transmits XOFF and XON with even parity. If the port detects a parity error, the port sends an inverted question mark to the printer instead of the character sent by the host system. The port expects no parity bit when it receives data. The port transmits XON and XOFF without parity bits. The port expects a parity bit when the port receives a data frame. The port ignores the parity bit. The port uses even parity when it transmits XON and XOFF. Some printers post a 54 Standard Serial Error or a 54 Serial Option x Error (x represents the number of the serial port) the first time they detect a transmission error (parity, overrun, or framing). The 54 Standard Serial Error or the 54 Serial Option x Error can be reset from the printer operator panel or through MarkVision Professional. See your printer documentation for more information. If repeated serial errors occur, power the printer off and then back on to restore proper serial operation.