sab(4)

NAME

sab - Infineon SAB82532 (ESCC2) serial communications driver

SYNOPSIS

device sab

DESCRIPTION

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 TIOCM

BIS ioctl(2)
commands.

FILES

/dev/tty[a-b] Serial ports.

SEE ALSO

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

HISTORY

The sab driver first appeared in FreeBSD 5.1.

BUGS

The sab does not support cua minor devices.

BSD October 29, 2001

BSD