User`s guide

Introduction • 9
1.3.15 IEEE-1284 Parallel Port/Printer Interface
The parallel I/O interface signals are routed to J5 providing signal connection
for a DB25 on the cPI-R6765. This port supports the full IEEE-1284
specifications and provides the basic printer interface.
Firmware will initialize the parallel port as LPT1 with ISA I/O base address of
378h. This default configuration also assigns the parallel port to IRQ7. The
printer interface mode (Normal, Extended, EPP, or ECP) is selectable
through the BIOS SETUP utility with the Winbond W83977 Super I/O device
managing the cPCI-6765(A)’s parallel port.
1.3.16 Universal Serial Bus (USB)
The Universal Serial Bus (USB) R1.1 provides a common interface to
lower-speed peripherals such as keyboard, mouse, speakers, printer, etc.,
simplifying the cabling requirements of computers and allowing bit rates of
up to 12Mb/s. There are in total two USB ports on the cPCI-6765(A) with one
routed for front panel access and the other is available through a Rear
Transition Module and is controlled by the Intel 82371EB (PIIX4E) device.
1.3.17 Serial I/O
Two serial ports are supported on the cPCI-6765(A). The EIA232 drivers and
receivers reside on board. COM1 is a DB9 connector on the front panel or a
pin header on the rear board. COM2 is available as a DB9 connector on the
rear board.
Both serial ports include a complete set of handshaking and modem control
signals, maskable interrupt generation, and data transfer rates up to 115.2K
Baud. COM1 serial port is RS-232 compatible with COM2 being
RS-232/422/485/485+ selectable. Both ports are configured as DTE.
Firmware will initialize the two serial ports as COM1 and COM2 with ISA I/O
base addresses of 3F8h and 2F8h respectively. This default configuration
also assigns COM1 to IRQ4 and COM2 to IRQ3
1.3.18 Keyboard/Mouse Controller
The cPCI-6765(A) includes an on-board PC/AT keyboard and mouse
controller. The keyboard/mouse signals are available through the PS/2
circular DIN on the front panel and rear panel. The cPCI-6765(A)’s
keyboard/mouse controller resides in the Winbond W83977 Super I/O device