Themis USPIIi-1v, Hardware Manual

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Themis Computer
4-3
4. Hardware Overview
4.1.6 SME PCI I/O Controller
The SME PCI I/O Controller (SME: STP2003QFP) is a +5 Volt ASIC that provides a Master / Slave interface
bus compliant with
PCI Local Bus Specification , Revision 2.1. The PCI I/O is connected to the SME APB via
the local PCI bus. MII support for 10Base-T (802.3) and 100Base-T (802.30) Ethernet is provided by PCI I/O
as well as an IEEE 1149.1 JTAG compliant architecture, a 40 MHz SCSI clock oscillator, a 10MHz real-time
clock, and an expansion bus interface (EBus2).
Support for CS4231 Audio CODEC, the National PC87303 Super I/O, the Siemens SAB82532 Dual 16C550
Synchronous/Asynchronous Serial Port controllers, the NVRAM, Time-of-Day, Voltage Sensors, and a boot
PROM control port is provided via the EBus2. The boot PROM control port interface directly to the EPROM.
4.1.7 Symbios SCSI Controller
The Symbios SCSI Controller (SYM53C876) provides two (2) UltraWide SCSI interfaces (40 MB/sec). In
order to maximize speed, it is attached directly to the SME APB through local 33 MHz PCI Bus A. A
maximum burst rate of up to 132 MB/sec is supported.
4.1.8 FPGA
The FPGA device on the USPII i -1v is the Altera EPF8820. It resides on the EBus2 of the baseboard PCI I/O
ASICs. Physically, the FPGA is located on the baseboard. The FPGA implements a voltage monitor, boot
address decoder, a three-level watchdog timer, and the SYSTEM_OK_LED register. At boot-up the FPGA
self loads from a serial EPROM (Altera EPC1213PC8) to program itself for these features. For more
information on the FPGA, refer to Chapter 6, "FPGA, Watchdog, Voltage and Temperature Sensors."
4.1.9 National Super I/O
The National Super I/O (PC87307-ICE) is an industry standard, single-chip solution that provides support for
a Floppy Disk Controller, PS/2 Keyboard and Mouse, real-time clock, two (2) fast full function synchronous/
asynchronous serial ports (Serial Ports C and D), and an IEEE 1284 bi-directional parallel port. Each
component is individually configured to maximize the performance of the USPII
i -1v.
4.1.10 Seimens SAB 82532
Physically located on the I/O board, the Seimens SAB 82532 Enhanced Serial Communication Controller
provides support for Serial Ports C and D and the SUN Keyboard and Mouse. Serial Ports C and D are
supported entirely independent of one another. Maximum external data transfer rate of 10 Mbits/second and a
maximum internal data transfer rate of 2 Mbits/second is attainable on each port.
4.1.11 FLASH
The 2 MB System Flash EPROM is a 2Mx8 Bit, Intel E28F016 device, or a Sharp LH28F320 device. It is
located on the EBus2. System Flash contains the OpenBoot PROM (OBP) specially configured for the PS/2
mode. See Chapter 2.1, "Determine Board Type and Configuration." for explanations on PS/2 and Sun
keyboard/mouse modes.