Lexmark X644e Mode D'Emploi

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.

There are four possible parity settings: Odd, Even, None, and Ignore.

Odd

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.

Even

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.

None

The port expects no parity bit when it receives data. The port transmits 
XON and XOFF without parity bits.

Ignore

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 

 or a 

 (x represents 

the number of the serial port) the first time they detect a transmission error (parity, 
overrun, or framing). The 

 or the 

 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.