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Page 3
1. Tsi340 Evaluation Board User Manual
This document explains the design and layout of the Tsi340 Evaluation Board User Manual. The
following topics are discussed:
•“Overview” on page 3
•“Board Design” on page 5
•“Board Layout” on page 11
•“Build of Materials (BOM)” on page 18
Revision History
80E3000_MA002_02, Formal, September 2009
This document was rebranded as IDT. It does not include any technical changes.
80E3000_MA002_01, Formal, May 2007
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This is the first version of this document.
Related Documents
Tsi340 Evaluation Board Schematics
1.1Overview
This document is divided in two sections: board design and board layout. In board design, the
components on the board and board functionary are explained. In the board layout section the
component placement and the setting options are explained.
1.1.1Evaluation Board Part Number
The Ts i340 evaluation board part number is Tsi340-RDK1 V1.0. The assembly number of the board is
E3000_AS001.
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1.1.2Functional Description
This section describes the components on th e evaluation board.
1.1.2.1Tsi340 PCI-to-PCI Bridge
•Primary PCI: 32bit, 66MHz
•Secondary PCI: 32bit, 66MHz
•Clocking Mode: Synchronized primary and secondary clocking
•Signal Standard: 3.3V LVTTL with 5V tolerance
•Supply Voltage: 3.3V
•Package: FQFP-128pin
1.1.2.2Primary PCI Connector
•32-bit universal PCI finger connector
•Support both 3.3 V and 5 V PCI slot
•Compliant with PPCI Specification (Revision 2.3)
•VIO pins are not supported
1.1.2.3Secondary PCI Connector
•Four 3.3 V, 32 bit, PCI connector slots
•PCI clocking generated from Tsi340
•Compliant with PCI Specification (Revision 2.3)
1.1.2.4Board Form Factor
•Form Factor: 4-layers Micro ATX Add-in Card with extended height
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2. Board Design
Tsi340
PCI-to-PCI Bridge
Secondary Interface
3.3V/5V 32Bit PCI
Finger Edge Connector
3.3V 32Bit PCI Thru-Hole Connector Slot B
66MHz
3.3V 32Bit PCI Right Angle Connector Slot A
3.3V 32Bit PCI Thru-Hole Connector Slot C
3.3V 32Bit PCI Thru-Hole Connector Slot D
66MHz
5.0V
3.3V
DIPSWITCH
SETTING
Primary Interface
ATX Power
Connector
The following sections explain the design of the evaluation board, its components, and their
functionality.
2.1Overview
The Tsi340 PCI-to-PCI bridge evaluation board has the necessary functionality to evaluate all the
features of the Tsi340. The primary PCI side of the Tsi340 is wired to a PCI finger connector. The
secondary PCI side is wired to four, 32-bit, 3.3 V PCI connectors. Figure 1 shows the board block
diagram.
Many features can by exercised with shunt jumpers and switches.
Figure 1: Board Block Diagram
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P_CLKS_CLK_OUT0
S_CLK_OUT1
S_CLK_OUT2
S_CLK_OUT3
Tsi340
DIP
Switch
Secondary PCI
32bit 33/66MHz
Primary PCI
32bit 33/66MHz
PCI_M66EN
2.2Clocking
Tsi340 is a synchronous device, where the secondary clock outputs are synchronous to the primary
clock input.
Figure 2 shows the PCI clocking connection.
Figure 2: Clock Signals
2.2.1Domains
Primary and secondary clocking domains are described in the following sections.
2.2.1.1Primary PCI Clock Domain
The primary clock is sourced from a PCI host. It must be synchronous with the primary PCI bus
(according to the PCI Specification (Revision 2.3))
The PCI host sets the clock frequency based on its M66EN signal level. However, the Tsi340
evaluation board has the option of forcing the PCI host's M66EN signal low with a DIP switch setting
on S1. Refer to “DIP Switch Package/ Individual Switch Position” on page 14 for more information.
2.2.1.2Secondary PCI Clock Domain
T si340 has four secondary clock outputs, which provide PCI_CLKin for four on-board PCI connectors.
The secondary clock outputs are derived from the primary PCI clock input.
2.2.2M66EN Signal
The M66EN signal from the primary side PCI finger connector is directly routed to four on-board PCI
connectors. A DIP switch is attached to M66EN that is used to force M66EN to ground so tha t the
33 MHz PCI clock can be set. Refer to “DIP Switch Package/ Individual Switch Position” on page 14
for more information.
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2.3Arbitration
The T si340 has a built-in PCI arbiter for the secondary bus. The arbitration signals are connected to the
four PCI connectors on the board. Table 1 shows the Tsi340 arbitration signal assignment to each of
connectors.
Table 1: Arbitration Assignment
Tsi340 REQ/GNT SignalsConnector
0J4
1J3
2J2
3J1
2.4Power
The maximum current draw per rail for the bridge board with no cards plugged-in is indicated in
Table 2.
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Table 2: Maximum Current Draw with No Plug-in Card
RailCurrent
-12 V0A
+12 V0A
5V0A
3.3 V<750mA
3.3 VAUX0A
2.4.1Finger Connector Current Limit
When plug-in cards are added to the Tsi340 evaluation board, the current draw must not exceed the
capacity of the finger connector. The maximum current draw per rail for the bridge board with cards
plugged-in is indicated in Table 3.
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The system user must limit its total power consumption to 25W budget from all power rails on the
primary finger connector based on PCI specification
Table 3: Maximum Current Draw Per Rail
RailCurrentPower
-12V100 mA1.2 W
+12V500 mA6 W
5V5 A25 W
3.3V7.6 A25 W
3.3VAUX375 mA1.2W
2.4.1.1Optional ATX Power Connector
If the total power requirement of plug-in cards exceed the current draw as indicated in Table 3, an
auxiliary ATX power supply may be used to augment the power capacity of the system. The bridge
board has an ATX power supply connector assembly option.
The ATX connector is usually not installed.
If the optional ATX power connector is used, the ATX power supply and PCI finger
connector supply must come from the same supply source.
2.4.2Tsi340 Core Voltage Isolation
The T si340 supply voltage plane on the PCB can be isolated from th e boar d’s 3.3 V plane. This feature
is used to evaluate the current draw of the PCI bridge. The connection from the Tsi340 supply to the
board 3.3 V is done through three 0 Ohm resistors: R5, R6, R7. Current measurement can be done by
removing the resistors and insert an amp meter between the resistor pads on the PCB.
2.4.3PRSNT Pin Power Setting on Primary PCI
The finger connector PRSNT[1:2] pins are wired to indicate a power requirement of 25 W. This is the
maximum power the PRSNT[1:2] pins can indicate for an add-in card. The PRSNT pin on the
secondary side connectors is not used.
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2.4.4Primary and Secondary Side VIO
The bridge board can plug into a 3.3 V or 5 V system. The primary side input/output signalling uses the
same voltage as the system. The secondary side voltage is independent of the primary side voltage. The
secondary side signalling voltage is hard-wired to 3.3 V. If 5 V signalling is required on the secondary
side, the PCB assembly must be modified in the following ways:
•Remove the R1, R2, R3 resistors
•Solder jumper wires (AWG22) between the 5V test pads and the SVIO test pads.
Figure 3: Modified PCB Traces for 5 V Signaling on Secondary PCI Bus
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2.5Interrupts and IDSEL
The add-in card interrupts are routed directly to the PCI system host. The Tsi340 is not involved with
interrupt routing. The connection of the interrupt lines from the PCI connectors to the finger connector
is arranged so that Int A of each PCI connector is routed to a different interrupt on the fin ger connect or.
Add-in card are numbered using AD[24:27] lines. Table 4 maps the interrupt connections designation
and AD line connections.
Tsi340 is reset from the system host reset signal (from the finger connector). The secondary side reset
is driven by Tsi340. There is no manual reset on the board.
INTA Routing to
Primary PCI
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3. Board Layout
In the board layout section of this document the component placement and the setting options are
explained.
3.1PCB Layers
The Tsi340 Printed Circuit Board (PCB) stack up is made of the following four layers:
•Layer 1: PCB primary side (where most traces are routed)
•Layer 2: Ground plane
•Layer 3: Power plane
•Layer 4: Secondary side
Figure 4 shows the four layers of the PCB.
Figure 4: PCB Stack Up
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5.5”
7.87”
3.2Board Dimensions
The board dimensions are based on PCI standard for a 32-bit Variable Height Short Add-in card.
However, the height of the card exceeds the maximum specified in the standard. The board dimensions
are shown in Figure 5.
Figure 5: Board Dimensions
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3.3Component Placement
The placement of the components, jumpers, and switches are shown in Figure 6.
Figure 6: Component Placement
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ON
OFF
3.4Switches
DIP switch S1 has eight slide switches, which are identified with numbers 1-to-8.
Figure 7: DIP Switch Package/ Individual Switch Position
Table 6 describes the settings for the S1 DIP switch..
Table 6: DIP Switch S1 Settings
S1DescriptionDefaultOn/Off setting
1
Tsi340 P_CLKRUN# input pin
connection
2
Tsi340 LOO pin connection
3
P_RST# signal level
4
PCI_M66EN# signal level
5
Tsi340 S_CLKRUN# input pin
connection
6
Unused
7
Unused
8
Unused
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON: P_CLKRUN# is pulled down for normal operation.
OFF: P_CLKRUN# is pulled up for test purpose only.
ON: LOO is held low for test purpose only.
OFF: LOO is pulled up for normal operation.
ON: Force P_RST# to low for test purpose only.
OFF: Normal operation.
ON: Force PCI_M66EN to low for 33MHz clocking operation
OFF: Normal operation (PCI clock frequency is determined by primary
PCI_CLKin and PCI_M66EN# signal level from the secondary plug-in
cards)
ON: S_CLKRUN# is pulled down for normal operation.
OFF: S_CLKRUN# is pulled up for test purpose only.
OFF
OFF
OFF
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3.5Connectors
Board connectors are used to add cards and power supplies to the Tsi340 board.
3.5.1J1 through J4 Connectors - PCI Plug-in Card
J1, J2, J3, J4 are used to connect plug-in card on Tsi340’s secondary PCI side. The connector’s pin
assignment is standard PCI 32-bit, 3.3 V connectors.
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
3.5.2J5 - ATX Power Connector (Not Installed)
This connector is not installed on the Tsi340 board. This connector is only required if the voltage drop
at the plug-in card is to high. Table 11 shows the pin assignments for the J5 connector.
The bridge board can plug into a 3.3 V or 5 V systems. The primary side input/output signaling uses
the same voltage as the system. The secondary side voltage is independent of the primary side voltage.
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4. Build of Materials (BOM)
Table 10: Tsi340 Evaluation Manual Build of Material