Electronics
Figure 4 shows a simplified block diagram of the 2109 Model F16 CPU subsystem
electronics.
Embedded processor
The embedded processor is an Intel 80960VH processor with a clock speed of 100
MHz. It contains the following features:
v
A high-performance RISC processor core (compatible with the 2109 series of
switches and the 3534 switch)
v
An integrated EDO memory controller (for DRAM, SRAM, ROM, and Flash
memory)
v
A PCI bus interface
v
A complex programmable logic device (CPLD) for SDRAM control
v
Two direct memory access (DMA) channels
v
An I2C interface
v
General purpose I/O
You access system memory through the local bus. The external CPLD SDRAM
device provides SDRAM controller functionality at 33 MHz. It supports parity
checking to enhance the data integrity of the system. The CPU communicates with
the ASIC and the 10BASE-T or 100BASE-T Ethernet media access controller
(MAC) through the PCI interface. An external PCI bus arbiter enables the Ethernet
device to be a bus master.
You can also access the RS232 Universal Asynchronous Receiver Transmitter
(UART) serial port through the local bus. Other I/O peripherals, such as the
real-time clock, the two power supply controls, the LEDs, the three digital
I/O Port
Clock
Temp
Sensor
Power
Supply
Control
I C Bus (100 KHz)
2
Local Bus (33 MHz)
PCI Bus (33 MHz)
SSLT2 Bus (106.25 MHz)
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E/F/FL_port
ASIC 1
(ports 8-15)
Ethernet
MAC/PHY
SDRAM
RS232 Port
User Flash
Boot Flash
80960VH
CPU
E/F/FL_Port
ASIC 0
(ports 0-7)
SJ000310
Figure 4. Simplified 2109 Model F16 CPU subsystem block diagram
4
IBM TotalStorage SAN Switch: 2109 Model F16 User’s Guide
Summary of Contents for F16
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