NAME    [Toc]    [Back]

     sab -- Infineon SAB82532 (ESCC2) serial communications driver

SYNOPSIS    [Toc]    [Back]

     device sab

DESCRIPTION    [Toc]    [Back]

     The sab is a Infineon (formerly Siemens) SAB82532 (ESCC2) serial interface
 chip used in PCI-based UltraSPARC Sun workstations.  The ESCC2 provides
 two independent input/output channels per instance.	These chips
     are normally used to provide RS-423 and RS232 serial ports for general
     purpose use.

     The sab driver supports all of the standard tty(4) ioctl calls.  The status
 of the DTR, RTS, CTS, and DCD signals can be queried with TIOCMGET
     command, but, due to limitations in the hardware, only the DTR and RTS
     signals can be modified with TIOCMSET, TIOCMBIC, and TIOCMBIS ioctl(2)
     commands.

FILES    [Toc]    [Back]

     /dev/tty[a-b]   Serial ports

SEE ALSO    [Toc]    [Back]

     ioctl(2), intro(4), tty(4)

HISTORY    [Toc]    [Back]

     The sab driver first appeared in FreeBSD 5.1.

BUGS    [Toc]    [Back]

     The sab does not support cua minor devices.


FreeBSD 5.2.1		       October 29, 2001 		 FreeBSD 5.2.1