PCI 9054RDK- LITE Hardware Reference Manual v1.3
10
© 2006 PLX Technology, Inc. All rights reserved.
3.7 PLX Option Module Connector
The PLX Option Module Connector resides
directly on the 32-bit multiplexed J mode
Processor/Local Bus. Either/both a master
and/or slave device may be connected to this
connector, which resides at address range 4000
0000 - 4FFF FFFF. The external arbiter in the
CPLD uses CS0# to select the POM module.
Page 5 of the RDK schematic details all of the
signals of the 100-pin connector. If desired, this
connector can be used for expansion and
prototyping.
3.8 Hardware
Modules
The RDK-LITE provides four hardware modules:
1) RS232 interface, 2) debug and status LEDs,
3) reset circuitry, and 4) flash ROM socket. This
is in addition to the clock generator used to
provide the 50 MHz Processor/Local Bus clock
to the PCI 9054, CPLD, POM, and the
Synchronous SRAM.
3.8.1 RS232
Interface
The RS232 interface circuit combines a DB9
male connector with an RS232 transceiver. The
transceiver chip is made by Maxim Integrated
Products and can be hardware configured or
software programmed as Data Terminal
Equipment (DTE) or Data Circuit Equipment
(DCE).
3.8.2
Debug and Status LEDs
There are four green user-defined LEDs near
the top edge of the RDK board. The anode of
each LED is
connected to
3.3V
DC
through a
150-ohm ¼ watt resistor. The cathode of each
LED is connected to a prototyping pad for
customer use. As long as an active low signal
can sink 16 – 20 mA of current, it can directly
drive the LEDs without changing the resistor
value.
3.8.3 Reset
Circuitry
3.8.3.1 Power-on-Reset
Power-on-reset is controlled by an
external 3.3-Volt power supply
supervisor. The valid power-on-reset
period is 1ms, which is hardwired into
the supply supervisor IC.
3.8.3.2
Reset Pushbutton Switch
The Reset Pushbutton switch allows the
user to reset the Processor/Local Bus
side of the board only. When this
pushbutton switch is pressed, a manual
reset can be generated to reset the
devices on the PCI 9054
Processor/Local Bus.
3.8.4
Flash ROM Socket
A 32-pin PLCC footprint and related PLCC
socket are provided on the RDK. It can be used
to install a 3.3 volt 512KB byte-wide flash
memory device. It can be used to store the
firmware for booting Processor/Local Bus
master devices such as microprocessors or
DSPs. The flash ROM footprint is pre-connected
to power and ground. The prototyping pads are
provided for all control signal pins as well as all
address and data lines.
Содержание PCI 9054RDK-LITE
Страница 1: ...PCI 9054RDK LITE Hardware Reference Manual ...
Страница 2: ......
Страница 6: ......
Страница 24: ......
Страница 30: ......
Страница 34: ...PCI 9054RDK LITE Hardware Reference Manual v1 3 26 2006 PLX Technology Inc All rights reserved ...