Broadcom BCM91125PCIX User manual

USER MANUAL
BCM91125PCIX
91125PCIX-UM100-R
16215 Alton Parkway •P.O. Box 57013 •Irvine, CA 92619-7013 • Phone: [phone] •Fax:[phone]/04
Evaluation Board

Broadcom Corporation
P.O. Box 57013
16215 Alton Parkway
Irvine, CA 92619-7013
© 2004 by Broadcom Corporation
All rights reserved
Printed in the U.S.A.
Broadcom®and the pulse logo are registered trademarks of Broadcom Corporation and/or its subsidiaries in the United
States and certain other countries. All other trademarks mentioned are the property of their respective owners.
REVISION HISTORY
Revision Date Change Description
91125PCIX-UM100-R 07/02/04 Initial release.

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TABLE OF CONTENTS
Section 1: Product Overview ..............................................................................................1
Introduction .................................................................................................................................................. 1
Items Included with the Shipment .............................................................................................................. 1
Features ........................................................................................................................................................ 1
Hardware ................................................................................................................................................ 1
Firmware ................................................................................................................................................. 2
BCM91125PCIX Front Panel ........................................................................................................................ 3
BCM91125PCIX Rear Panel ......................................................................................................................... 3
Section 2: Getting Started...................................................................................................4
Section 3: Physical Description .........................................................................................6
Block Diagram .............................................................................................................................................. 7
Connectors ................................................................................................................................................... 8
ROM Emulator Pinout ........................................................................................................................... 10
LEDs ............................................................................................................................................................ 11
Jumpers, Fuses, and Battery .................................................................................................................... 13
Switches...................................................................................................................................................... 16
Acceptable PLL Settings ........................................................................................................................... 18
Supported DRAM ....................................................................................................................................... 18
Acceptable I/O Bridge Settings................................................................................................................. 19
BCM1125H Peripheral Devices ................................................................................................................. 19
Section 4: Firmware Configuration ..................................................................................21
Section 5: Troubleshooting ..............................................................................................22
Corrective Procedures............................................................................................................................... 22
Replacement Parts ..................................................................................................................................... 22
Section 6: Web Resources................................................................................................23
SiByte .......................................................................................................................................................... 23
Peripherals.................................................................................................................................................. 23
Bus Interface .............................................................................................................................................. 24

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LIST OF FIGURES
Figure 1: BCM91125PCIX Front Panel...............................................................................................................3
Figure 2: BCM91125PCIX Rear Panel ...............................................................................................................3
Figure 3: BCM91125PCIX Top View ..................................................................................................................6
Figure 4: BCM91125PCIX Block Diagram .......................................................................................................... 7
Figure 5: Connector Callouts ..............................................................................................................................8
Figure 6: LED Callouts ......................................................................................................................................11
Figure 7: Jumper, Fuse, and Battery Callouts ..................................................................................................13
Figure 8: Switch Callouts ..................................................................................................................................16

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LIST OF TABLES
Table 1: Connector Descriptions ........................................................................................................................ 9
Table 2: ROM Emulator Pinout......................................................................................................................... 10
Table 3: LED Descriptions................................................................................................................................ 12
Table 4: Jumper, Fuse, and Battery Descriptions ............................................................................................ 14
Table 5: Static Configuration Jumper (J76) Settings ........................................................................................ 14
Table 6: Switch Descriptions ............................................................................................................................ 16
Table 7: Acceptable PLL Settings .................................................................................................................... 18
Table 8: Acceptable I/O Bridge Settings........................................................................................................... 19
Table 9: SMBus Peripherals............................................................................................................................. 19
Table 10: Generic Bus Peripherals................................................................................................................... 19
Table 11: GPIO Map......................................................................................................................................... 20
Table 12: PCI/X Interrupt Map.......................................................................................................................... 20
Table 13: Firmware Generic Bus Memory Mapping ......................................................................................... 21
Table 14: Firmware Configuration Bits Mapping .............................................................................................. 21
Table 15: Replacement Parts ........................................................................................................................... 22
Table 16: SiByte Web Resources..................................................................................................................... 23
Table 17: Peripheral Web Resources............................................................................................................... 23
Table 18: Bus Interface Web Resources.......................................................................................................... 24

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Page vi Document 91125PCIX-UM100-R

User Manual BCM91125PCIX
07/02/04
Broadcom Corporation
Document 91125PCIX-UM100-R Product Overview Page 1
Section 1: Product Overview
INTRODUCTION
The BCM91125PCIX evaluation board is an evaluation platform intended to support the needs of prospective
users of the BCM1125H processor. This user manual provides information on how to get the BCM91125PCIX
evaluation board up and running quickly. This manual also describes how to locate, configure, and observe
the various connectors, switches, jumpers, and LEDs on the BCM91125PCIX, allowing software development
and evaluation of the BCM1125H processor to begin.
For additional information on this board and the BCM1125H processor, go to:
http://sibyte.broadcom.com/public.
ITEMS INCLUDED WITH THE SHIPMENT
The following items are included with the BCM91125PCIX evaluation board shipment:
• BCM91125PCIX evaluation board in ATX case with power supply and power cable
• OCDemon Macraigor Systems Wiggler parallel port JTAG probe
• Viosoft ARRIBA®Embedded Edition CD
• This document
FEATURES
This section describes the BCM91125PCIX’s features.
HARDWARE
• BCM1125H processor
• microATX form factor board mounted in ATX case with a power supply (AC Input: 115V/230V, 10A/5A, 60
Hz/50 Hz; DC Output: 230W)
• Two DDR SDRAM DIMM slots
- Ships with two 256MB PC2100 (266 MHz) w/ ECC DIMM
• Two 10/100/1000 Mbps Ethernet interfaces with RJ45 connectors
• Two UARTs with RS232 interface
• One 32-bit, 33/66-MHz, 3.3V PCI connector
• Two 64-bit, 33/66-MHz, 3.3V PCI-X connectors
•2MBFlashROM
• Two SMBus channels with the following devices connected:
-RTC
- EEPROM
- Temperature sensor
- DIMMs SPD EEPROMs
• Two USB connectors

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• EJTAG connector
• Four-character LED display
• Compact flash (CF) slot
FIRMWARE
The Common Firmware Environment (CFE) is designed to be easily portable to designs incorporating current
and future Broadcom MIPS64-compatible broadband processors. Supported platforms include Broadcom’s
SiByte processor family (BCM1250, BCM1125H, and so forth), 32-bit and 64-bit memory models, and big and
little-endian operation. There are many parameters configurable at build time that can be used to customize
CFE to suit diverse customer requirements.
On the BCM91125PCIX, CFE can load programs (such as S-records, raw binary, or ELF formatted) from
bootstrap devices in a variety of ways, including:
• Via either Ethernet port or from a TFTP server
• Via a CF card in the CF slot
• Via the serial port (S-records only)
For additional information on CFE, refer to the
Common Firmware Environment (CFE) Specification document
that can be found in the CFE source code distribution at: http://sibyte.broadcom.com/public.

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BCM91125PCIX FRONT PANEL
Figure 1: BCM91125PCIX Front Panel
BCM91125PCIX REAR PANEL
Figure 2: BCM91125PCIX Rear Panel

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Page 4 Getting Started Document 91125PCIX-UM100-R
Section 2: Getting Started
Complete the following steps to get to a BCM91125PCIX CFE (firmware) prompt.
1Connect a 9-pin null modem cable to the serial port of the BCM91125PCIX and a serial port on a workstation/
PC.
2Use a terminal program and set it to 115200 bps, 8-bit data, 1-stop bit, no parity, and no flow control.
3Power up the BCM91125PCIX by plugging in the provided cable to the power supply socket on the back of the
box and into a wall socket. Then hit the power button on the front panel.
After a short delay, the CFE initialization output and serial console prompt should display. The following is an
example of the output:
CFE version 1.0.41 for BCM91125PCIX (64bit,SP,BE,MIPS)
Build Date: Mon May 3 20:13:58 PDT 2004 (mpl@lc-sj1-091)
Copyright (C) 2000,2001,2002,2003 Broadcom Corporation.
Initializing Arena.
Initializing PCI. [normal]
PCI bus 0 slot 0/0: SiByte, Inc. BCM1250 PCI Host Bridge
PCI bus 1 slot 1/0: Advanced Micro Devices (PLX) HT7520 PCI-X Tunnel
PCI bus 1 slot 1/1: Advanced Micro Devices (PLX) HT7520 PCI-X IOAPIC
PCI bus 1 slot 2/0: Advanced Micro Devices (PLX) HT7520 PCI-X Tunnel
PCI bus 1 slot 2/1: Advanced Micro Devices (PLX) HT7520 PCI-X IOAPIC
Initializing Devices.
BCM91125PCIX board revision 1
PCIIDE: 0 controllers found
Config switch: 2
CPU: 1125H A2
L2 Cache: 256KB
SysCfg: 0080000020DB0860 [PLL_DIV: 16, IOB0_DIV: CPUCLK/3, IOB1_DIV: CPUCLK/2]
CPU type 0x40103: 800MHz
Total memory: 0x20000000 bytes (512MB)
Total memory used by CFE: 0x8FE84280 - 0x90000000 (1555840)
Initialized Data: 0x8FE84280 - 0x8FE8DE70 (39920)
BSS Area: 0x8FE8DE70 - 0x8FE8E5E0 (1904)
Local Heap: 0x8FE8E5E0 - 0x8FF8E5E0 (1048576)
Stack Area: 0x8FF8E5E0 - 0x8FF905E0 (8192)
Text (code) segment: 0x8FF905E0 - 0x8FFFFFB0 (457168)
Boot area (physical): 0x0FE43000 - 0x0FE83000
Relocation Factor: I:F03905E0 - D:0DF84280
CFE>
4At the prompt, a program can be run via the network from a TFTP server by doing the following:
a. Connect the BCM91125PCIX Ethernet port E0 with an Ethernet cable to a switch, repeater, or directly to
the Ethernet port of the file server.
b. To initialize Ethernet port E0, type the following:
Note: Because the Broadcom PHYs handle direct connects automatically, a crossover cable for
direct connects is not needed.

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Document 91125PCIX-UM100-R Getting Started Page 5
ifconfig eth0 -auto
c. To run a program, type the following:
boot -elf tftp_server:/path_to_software/program
Note: The ifconfig eth0 -auto command can only be used with a DHCP server.

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Section 3: Physical Description
The BCM91125PCIX is implemented in the standard microATX form factor. Figure 3 shows a top view of the
BCM91125PCIX.
Figure 3: BCM91125PCIX Top View

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Document 91125PCIX-UM100-R Block Diagram Page 7
BLOCK DIAGRAM
Figure 4 shows a block diagram of the BCM91125PCIX.
Figure 4: BCM91125PCIX Block Diagram
BCM1125H
2 USB
Connectors Flash ROM Compact Flash Slot
4-character
LED
PROM ICE
Connector
IO_AD
10/100/1000
Ethernet
Port EO
EO
Serial Port
S1
S1
RTC
SMBus 1
Serial Port
SO
SO
2 DIMM
Slots
MemBus
Temperature
Sensor
SMBus 0
EEPROM EJTAG
JTAG 1x32b PCI
Slot
PCI
HT to PCIX
Bridge
HT 2x64b PCIX
Slots
PCIX
10/100/1000
Ethernet
Port E1
E1

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CONNECTORS
Figure 5 shows the board and identifies connectors numerically. For a description of each connector callout,
compare Figure 5’s number callouts with Table 1.
Figure 5: Connector Callouts

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Document 91125PCIX-UM100-R Connectors Page 9
The following table shows the BCM91125PCIX connectors.
Table 1: Connector Descriptions
Board ID Description
J7 Fan power connector (pin 1 = GND, pin 2 = 12VDC)
J9 10/100/1000 Mbps Ethernet Port E0
J10 10/100/1000 Mbps Ethernet Port E1
J13 ROM Emulator connector (see Table 2 on page 10)
J15 DEBUG_L trigger for scope (pin1 * = GND, pin2 = DEBUG_L)
J16 EJTAG connector
J17 External Cold Reset switch connector (pin 1 = GND, pin 2 = COLDRES_L)
J19 1.2V core supply sense (pin1 ** = GND, pin2 = 1.2V)
J21 ATX power connector
J22 ATX case power switch connector
J38 2.5V supply sense (pin1 ** = GND, pin2 = 2.5V)
J39 1.25V supply sense (pin1 ** = GND, pin2 = 1.25V)
J40 DDR SDRAM DIMM slot 1 (CS 2/3)
J41 DDR SDRAM DIMM slot 0 (CS 0/1)
J42 IO_CLK100 connector
J44 3.3V, 33/66 MHz, 32b PCI slot, BCM1125 PCI device 5
J48 Dual stack RS-232 serial port connectors (top = serial port S0, bottom = serial port S1)
J67 ROM emulator write line (pin 1 * = IO_WR_L, pin 2 = no connect)
J77 3.3V, 66/100/133 MHz, 64b PCI-X slot A, PLX HT7520 device 0
J78 3.3V, 66/100/133 MHz, 64b PCI-X slot B, PLX HT7520 device 1
J79 3.3/5V Compact Flash slot
J1701 Dual stack USB ports
* = Pin 1 located on the board by finding the arrow that points to it on the PCB silkscreen.
** = Pin 1 located by viewing the front of the board for the square solder pad.

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ROM EMULATOR PINOUT
Note: The table layout reflects the physical location of the pins on the connector. Also all I/O
signals are 3.3V outputs that are tolerant of 5V inputs.
Table 2:
ROM Emulator Pinout
Odd Pin Name Odd Pin
Number
Even Pin
Number Even Pin Name
GND 1 2 AD20
3.3 V PWR 3 4 AD19
AD18 5 6 AD16
AD17 7 8 AD15
AD14 9 10 AD12
AD13 11 12 AD7
AD8 13 14 AD6
AD9 15 16 AD5
AD11 17 18 AD4
OE_L 19 20 AD3
AD10 21 22 AD2
ROMEMUCS_L 23 24 AD1
AD31 25 26 AD0
AD30 27 28 AD24
AD29 29 30 AD25
AD28 31 32 AD26
AD27 33 34 GND

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LEDS
Figure 6 shows the positions of the LEDs numerically. Compare Figure 6’s number callouts with a description
of each LED in Table 3 on page 12.
Figure 6: LED Callouts

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Table 3: LED Descriptions
Board ID Color Description
D3 Green PHY 0 Slave indicator
D4 Green PHY 0 Receive indicator
D5 Green PHY 0 Transmit indicator
D6 Green PHY 0 Full-duplex indicator
D7 Green PHY 0 Link 1 indicator
D8 Green PHY 0 Link 2 indicator
D9 Green PHY 1 Slave indicator
D10 Green PHY 1 Receive indicator
D11 Green PHY 1 Transmit indicator
D12 Green PHY 1 Full-duplex indicator
D13 Green PHY 1 Link 1 indicator
D14 Green PHY 1 Link 2 indicator
D20 Green 1.2V BCM1125 Core Power good indicator
D21 Green 5V Power good indicator
D22 Green 3.3V Power good indicator
D23 Green 2.5V Power good indicator
D31 Red RESET_OUT active indicator
D32 Red COLD_RESET active indicator
U74 Green Four-character LED display

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JUMPERS, FUSES, AND BATTERY
Figure 7 shows the positions of the jumpers, fuses, and battery alpha-numerically. Compare Figure 7’s alpha-
numeric callouts with a description of each jumper, fuse, or battery in Table 4.
Figure 7: Jumper, Fuse, and Battery Callouts

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Table 4: Jumper, Fuse, and Battery Descriptions
Board ID Function
J20 32b PCI clock select (open * = run at slowest PCI agent; closed = force 33 MHz)
J76 Static configuration jumpers (See Table 5 for more details)
F5 USB slot0 5V, 1A current limit fuse
F6 USB slot1 5V, 1A current limit fuse
F7 EJTAG 3.3V, 1A current limit fuse
BT1 RTC battery
* = default
Note: The table layout reflects the physical location of the pins on this header. The top of the
header (where pin 1 exists) is where the “J76” designator is on the board silkscreen.
Note: Jumpers should only be used to connect the odd pin with the even pin directly across from
it (for example, where pin 1 is connected to pin 2). Other connections could permanently damage
the board.
Table 5:
Static Configuration Jumper (J76) Settings
Odd Pin Name Odd Pin
#
EvenPin
#Even Pin Name Open Function Closed Function
3.3 V PWR 1 2 * CPU clock
divider pll_div[0]
Open = Off (for
switches SW11/
SW12)
Closed = On
3.3 V PWR 3 4 * CPU clock
divider pll_div[1]
See Table 6 for configuration details
3.3 V PWR 5 6 * CPU clock
divider pll_div[2]
3.3 V PWR 7 8 * CPU clock
divider pll_div[4]
GND 9 10 * CPU clock
divider pll_div[3]
RICE_IO_WR_L 11 12 reserved N/A N/A
3.3 V PWR 13 14 * BCM1125H
software config[0]
Open = Off (for
switches SW11/
SW12)
Closed = On
3.3 V PWR 15 16 * BCM1125H
software config[1]
See Table 6 for configuration details.
3.3 V PWR 17 18 * BCM1125H
software config[2]
* = Static configuration is also controlled by either switch SW11 or SW12. These signals are electrically OR’ed together, so if either is “On”
in the case of the switches (SW11 or SW12), or “Closed” in the case of the jumper (J76), the “On”/“Closed” value is selected. Otherwise, both
must be “Off” or “Open” to select the “Off”/”Closed” value.