pandaboard OMAP 4 Series User manual

OMAPTM 4 PandaBoard
System Reference Manual
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OMAPTM 4 PandaBoard System
Reference Manual
Revision 0.4
September 22, 2010
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IMPORTANT NOTICE
THIS DOCUMENT
This work is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported License. To
view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/ or send a letter to
Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
For more information, see http://creativecommons.org/license/results-one?license_code=by-sa
For any questions, concerns, or issues submit them to [email protected]
PANDABOARD DESIGN
These design materials referred to in this document are *NOT SUPPORTED* and DO NOT
constitute a reference design. Only “community” support is allowed via resources at:
http://pandaboard.org/content/community/home.
THERE IS NO WARRANTY FOR THE DESIGN MATERIALS, TO THE EXTENT
PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN
WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE
DESIGN MATERIALS “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
DESIGN MATERIALS IS WITH YOU. SHOULD THE DESIGN MATERIALS PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
We mean it; these design materials may be totally unsuitable for any purposes.
PandaBoard.org provides the enclosed product(s) under the following conditions:
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT,
DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by
PandaBoard.org to be a finished end-product fit for general consumer use. Persons handling the
product(s) must have electronics training and observe good engineering practice standards. As such, the
goods being provided are not intended to be complete in terms of required design-, marketing-, and/or
manufacturing-related protective considerations, including product safety and environmental measures
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typically found in end products that incorporate such semiconductor components or circuit boards. This
evaluation board/kit does not fall within the scope of the European Union directives regarding
electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and
therefore may not meet the technical requirements of these directives or other related directives.
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit
may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING
WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY
WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the
user indemnifies PandaBoard.org from all claims arising from the handling or use of the goods. Due to
the open construction of the product, it is the user’s responsibility to take any and all appropriate
precautions with regard to electrostatic discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL
BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES.
PandaBoard.org currently deals with a variety of customers for products, and therefore our arrangement
with the user is not exclusive. PandaBoard.org assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or services described
herein.
Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide
prior to handling the product. This notice contains important safety information about temperatures and
voltages. For additional information on PandaBoard.org environmental and/or safety programs, please
visit http://pandaboard.org.
No license is granted under any patent right or other intellectual property right of PandaBoard.org
covering or relating to any machine, process, or combination in which such PandaBoard.org products or
services might be or are used.
Mailing Address:
PandaBoard.org
1380 Presidential Drive
Richardson, TX 75081
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WARRANTY: The PandaBoard is warranted against defects in materials and workmanship for a period
of 90 days from purchase. This warranty does not cover any problems occurring as a result of improper
use, modifications, exposure to water, excessive voltages, abuse, or accidents. All boards will be returned
via standard mail if an issue is found. If no issue is found or express return is needed, the customer will
pay all shipping costs.
Before returning the board, please visit:
http://pandaboard.org/content/resources/troubleshooting.
To return a defective board, please request an RMA at:
http://pandaboard.org/content/return-merchandise-application.
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Preface
Read This First
About This Manual
This manual should be used by software and hardware developers of applications based on the
OMAP4430 chipset. This document describes the OMAP4430 PandaBoard hardware. This
document also gives the user information about the different interfaces on the OMAP4430
PandaBoard.
Related Documentation
àOMAP4430 Technical Reference Manual
àPandaBoard Schematic (750-2152-001-SCH) – Early Adopter Board
àPandaBoard Gerber Files (720-2152-001) – Early Adopter Board
àPandaBoard Bill-of-Materials (750-2152-001-EBOM) – Early Adopter Board
àPandaBoard Schematic (750-2152-002-SCH) – Production Board
àPandaBoard Gerber Files (720-2152-002) – Production Board
àPandaBoard Bill-of-Materials (750-2152-010-EBOM) – Production Board
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Revision History
Revision History
Rev Changes Date
0.1 Preliminary Release 24 Aug. 2010
0.2 Re-release after initial feedback 2 Sept. 2010
0.3 Document Board ID bits 8 Sept. 2010
0.4 Add information for schematics, PCB information 22 Sept. 2010
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Contents
1Introduction ............................................................................................................................................... 11
1.1 OMAP4430 PandaBoard Overview .......................................................................................................... 12
1.2 Overview of the OMAP4430 PandaBoard Kit Contents........................................................................... 13
2OMAP4430 PandaBoard Architecture ...................................................................................................... 14
2.1 Overview of the PandaBoard Architecture................................................................................................ 14
2.2 System Clock Distribution ........................................................................................................................ 17
2.3 OMAP4430 Processor ............................................................................................................................... 17
2.4 TWL6030 Power Companion IC............................................................................................................... 18
2.4.1 TWL6030 Core SMPS Outputs ........................................................................................................... 18
2.4.2 TWL6030 V1V8 SMPS Output ........................................................................................................... 19
2.4.3 TWL6030 V2V1 SMPS Output ........................................................................................................... 19
2.4.4 TWL6030 VMEM SMPS Output ........................................................................................................19
2.4.5 TWL6030 V1V29 SMPS Output ......................................................................................................... 19
2.4.6 TWL6030 LDO Power Resources ....................................................................................................... 19
2.4.7 TWL6030 Clock Circuitry ................................................................................................................... 20
2.5 TWL6040 Audio Companion IC............................................................................................................... 20
2.6 SYSBOOT Configuration ......................................................................................................................... 21
2.7 Miscellaneous Power Circuitry ................................................................................................................. 24
2.7.1 Input Power Circuitry........................................................................................................................... 24
2.7.2 USB/Ethernet Power Circuitry............................................................................................................. 26
2.8 Standard Volatile Memory ........................................................................................................................ 26
2.9 Debug UART Interface ............................................................................................................................. 26
2.10 SD/MMC Connector ................................................................................................................................. 27
2.11 HDMI Interface ......................................................................................................................................... 28
2.12 Display Interface ....................................................................................................................................... 30
2.12.1 Parallel Display DVI-D connector .................................................................................................. 30
2.12.2 Parallel Display Expansion Connector Interface............................................................................. 32
2.13 Bluetooth/WLAN Interfaces ..................................................................................................................... 36
2.14 Audio Interfaces ........................................................................................................................................ 38
2.15 USB Interfaces........................................................................................................................................... 39
2.15.1 USBOTG Interface.......................................................................................................................... 39
2.15.2 USBB1 Phy Interface ...................................................................................................................... 40
2.16 Expansion Connectors (J3 & J6) ............................................................................................................... 42
2.17 Camera Expansion Connector (J17).......................................................................................................... 44
2.18 Composite Video (J12).............................................................................................................................. 45
2.19 JTAG Connector (J8) ................................................................................................................................ 47
2.20 LED Indicators .......................................................................................................................................... 48
2.21 User Interface Features.............................................................................................................................. 49
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2.21.1 S1 – Push Button Switch ................................................................................................................. 50
2.21.2 S2 - Push Button Switch.................................................................................................................. 50
2.22 I2C Device Mapping .................................................................................................................................. 50
2.22.1 OMAP I2C1 ..................................................................................................................................... 50
2.22.2 OMAP I2C2 ..................................................................................................................................... 50
2.22.3 OMAP I2C3 ..................................................................................................................................... 51
2.22.4 OMAP I2C4 ..................................................................................................................................... 51
3PandaBoard S/W Interface ........................................................................................................................ 52
3.1 Readable Board Revision .......................................................................................................................... 52
3.2 PandaBoard Pin Multiplexing ................................................................................................................... 52
3.2.1 Panda Base Platform Pin Multiplexing ................................................................................................ 52
3.2.2 Camera Expansion Connector Pin Multiplexing.................................................................................. 56
3.2.3 Expansion Connector (J3 & J6) Pin Multiplexing ............................................................................... 57
3.3 OMAP4430 PandaBoard Key Components ..............................................................................................59
3.4 OMAP4430 PandaBoard Key Component Datasheet URLs .................................................................... 60
3.4.1 Connector Datasheets........................................................................................................................... 60
3.4.2 Key Electronic Component Datasheets................................................................................................ 61
4Test/Debug Information ............................................................................................................................ 62
4.1 PandaBoard Clock Signal Access ............................................................................................................. 62
4.1.1 H_FREF_ALTCLK_IN_OMAP Probe Point ...................................................................................... 62
4.1.2 USBB1_PHY_REFCLK Probe Point .................................................................................................. 63
4.1.3 CLK32K_AUD Probe Point ................................................................................................................ 63
4.2 PandaBoard Power Rail Signal Access ..................................................................................................... 64
4.2.1 TWL6030 SMPS Output Probe Points ................................................................................................64
4.2.2 VCXIO LDO Output Probe Point ........................................................................................................ 65
4.3 PandaBoard Interface Signal Access......................................................................................................... 66
4.3.1 TWL6040 PDM Interface Probe Points............................................................................................... 66
4.4 PandaBoard Schematic.............................................................................................................................. 67
4.5 PandaBoard Bill of Materials .................................................................................................................... 83
4.6 PandaBoard PCB Design Information....................................................................................................... 83
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Figures
Figure 1 – OMAP4430 PandaBoard Architectural Block Diagram ........................................................... 15
Figure 2 – OMAP4430 PandaBoard (Top View) .......................................................................................16
Figure 3 – SYSBOOT[5:0] Resistor Locations .......................................................................................... 24
Figure 4 – PandaBoard Input Power Circuitry Block Diagram.................................................................. 25
Figure 5 – Panda UART3/RS-232 Block Diagram .................................................................................... 27
Figure 6 – Panda SDMMC1 Card Cage Block Diagram............................................................................ 28
Figure 7 – Panda HDMI Interface Block Diagram..................................................................................... 29
Figure 8 – Panda Display Interface Block Diagram ................................................................................... 30
Figure 9 – Panda DVI-D Output Block Diagram ....................................................................................... 31
Figure 10 – Panda Display Expansion Block Diagram .............................................................................. 33
Figure 11 – Panda Display RMUX “A” Resistor Locations (Top Side of PCB) ....................................... 35
Figure 12 – Panda Display RMUX “B” Resistor Locations (Bottom Side of PCB) .................................. 36
Figure 13 – PandaBoard WLAN/Bluetooth Interface Block Diagram....................................................... 37
Figure 14 – Panda Audio Interface Block Diagram.................................................................................... 39
Figure 15 – Panda USBOTG Interface Block Diagram.............................................................................. 40
Figure 16 – Panda USBB1 Interface Block Diagram .................................................................................41
Figure 17 – Expansion Connector PCB Placement/Orientation................................................................. 42
Figure 18 – Composite Video Connectivity ............................................................................................... 46
Figure 19 – Composite Video Connector J12 PCB Orientation................................................................. 46
Figure 20 – 14-pin JTAG Connector (J8)................................................................................................... 47
Figure 21 – PandaBoard LED Locations.................................................................................................... 49
Figure 22 – 38.4 MHz Input Clock Probe Point (h_FREF_ALTCLK_IN_OMAP) .................................. 63
Figure 23 – USB Phy Ref Clock In Probe Point (USBB1_PHY_REFCLK) ............................................. 63
Figure 24 – 32KHz Audio Clock Probe Point (CLK32K_AUD)............................................................... 64
Figure 25 – TWL6030 SMPS Output Probe Points....................................................................................65
Figure 26 – TWL6030 VCXIO LDO Output Probe Points ........................................................................ 66
Figure 27 – TWL6040 PDM Interface Probe Points ..................................................................................67
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Tables
Table 1: PandaBoard Features .................................................................................................................... 12
Table 2: SYSBOOT[5:0] Definitions – Peripheral Preferred Booting ....................................................... 22
Table 3: SYSBOOT[5:0] Definitions – Memory Preferred Booting.......................................................... 23
Table 4: HDMI GPIO Definitions .............................................................................................................. 30
Table 5: DVI-D Display GPIO Definitions ................................................................................................ 32
Table 6: LCD Expansion Connector “A” Pin Definitions (J1)................................................................... 34
Table 7: LCD Expansion Connector “B” Pin Definitions (J4)................................................................... 35
Table 8: WLAN/Bluetooth Module GPIO Definitions............................................................................... 38
Table 9: USB Host Port/Ethernet GPIO Definitions .................................................................................. 41
Table 10: Expansion Connector “A” Pin Definitions (J3)..........................................................................43
Table 11: Expansion Connector “B” Pin Definitions (J6)..........................................................................44
Table 12: Camera Expansion Connector Pin Definitions (J17).................................................................. 45
Table 13: JTAG Connector Pinout (J8) ...................................................................................................... 48
Table 14: OMAP I2C1 Device Addresses................................................................................................... 50
Table 15: OMAP I2C2 Device Addresses................................................................................................... 50
Table 16: OMAP I2C3 Device Addresses................................................................................................... 51
Table 17: OMAP I2C4 Device Addresses................................................................................................... 51
Table 18: Board ID Read Values................................................................................................................ 52
Table 19: PandaBoard OMAP4430 Pin Multiplexing................................................................................ 56
Table 20: Camera Expansion Connector (J17) Pin Multiplexing Options ................................................. 57
Table 21: Expansion Connector (J3 & J6) Pin Multiplexing Options........................................................ 58
Table 22: OMAP4430 PandaBoard Key H/W Components....................................................................... 60
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1Introduction
This document is the System Reference Manual for the PandaBoard, a low cost OMAP4430 based board
supported through http://pandaboard.org. This includes system setup and debugging. This document
provides detailed information on the overall design and usage of the PandaBoard from the System
perspective.
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1.1 OMAP4430 PandaBoard Overview
PandaBoard is an OMAP4430 platform designed to provide access to as many of the powerful features of
the OMAP4430 Multimedia Processor as possible, while maintaining a low cost. This will allow the user
to develop software to utilize the features of the powerful OMAP4430 processor. In addition, by
providing expandability via onboard connectors, the PandaBoard supports development of additional
capabilities/functionality. See Table 1 for a listing of the PandaBoard features.
Feature
Processor OMAP4430
POP Memory Micron 8Gb LPDDR2 (EDB8064B1PB-8D-F)
PMIC TI (TWL6030 Power Management Companion IC)
14-pin JTAG GPIO Pins
Debug Support UART via DB-9 connector LEDs
PCB 4.5” x 4.0” (114.3 x 101.6 mm) 8 layers
Indicators 3 LEDs (two user-controlled, one overvoltage indicator)
HS USB 2.0 OTG Port Mini-AB USB connector, sourced from OMAP USB Transceiver
HS USB Host Port Four USB HS Ports, up to 500mA current out on each, two to
onboard connectors, two to expansion connectors
Audio Connectors 3.5mm, L+R out 3.5mm, Stereo In
SD/MMC Connector 6 in 1 SD/MMC/SDIO 4/8 bit support, Dual voltage
User Interface 1-User defined button Reset Button
DVI-D or HDMI, Optional user provided plug-in
display
Video
Optional Composite Video out to two-pin header
Power Connector USB Power DC Power
Camera Not included, but supported via camera expansion connector
Expansion Connectors
(not populated) See Paragraph 2.16, on page 42
LCD Expansion
Connectors (not
populated)
See Paragraph 2.12.2, on page 32
Table 1: PandaBoard Features
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1.2 Overview of the OMAP4430 PandaBoard Kit Contents
The OMAP4430 PandaBoard kit contains the following items:
à1 PandaBoard
àBoard packing material
à1 Shipping Box
The following items can be used with the PandaBoard, but are NOT included in the kit.
àUSB Cable (mini-AB to Type A)
àHDMI Cable (Type A)
àDB-9 Male-to-female cable (null-modem)
àHDMI-A Male to DVI-D Cable
àDC wall supply (+5Vdc) – an example of an acceptable supply is Digikey P/N T951-
P5P-ND. Information for this part may be found at:
http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepa
ge_link=hp_go_button&KeyWords=T951-P5P-ND
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2OMAP4430 PandaBoard Architecture
This chapter explains the architecture of the OMAP4430 PandaBoard.
2.1 Overview of the PandaBoard Architecture
Shown in Figure 1 is the Architectural Block Diagram of the OMAP4430 PandaBoard.
Listed below are the major components used on the PandaBoard.
àOMAP4430 Processor
àTWL6030 (Phoenix) Power Management Companion Device
àTWL6040 (Phoenix) Audio Companion Device
àPOP Mobile LPDDR2 SDRAM Memory
àHDMI Connector (Type A) – for OMAP4430 HDMI Transmitter output
àHDMI Connector (Type A) – for DVI-D output sourced via OMAP4 parallel display output
àAudio Input & Output Connectors (3.5mm)
àSD/SDIO/MMC Media Card Cage
àUART via RS-232 interface via 9-pin D-Sub Connector
àLS Research Module – 802.11b/g/n, Bluetooth, FM
The Platform also includes connectors that can be used for additional functionality and/or expansion
purposes. These connectors are not populated on the platform, but can be installed by the user. They are
indicated by the blue blocks in Figure 1, and include:
àCamera Connector (J17)
àLCD Expansion Connectors (J1 and J4)
àGeneric Expansion Connectors (J3 and J6)
àComposite Video Header (J12)
See Figure 2 on page 16 for a top side view of the Panda Platform.
The core components of the PandaBoard will be discussed in this section of the document. This would
include the OMAP4430 Processor and its POP LPDDR2 memory, the input clock circuitry, the TWL6030
Power Companion IC, and the TWL6040 Audio Companion IC. The functional interfaces will be
discussed in later sections of the document.
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CLK32KAO
TWL6030
Power
Companion IC
+
External LDOs
TWL6040
Audio
Companion IC
Clocks
Mini-AB USB
Connector (J18)
SDMMC Card
Cage (J14)
HDMI/DVI-D
Connector (P2)
Camera Board
Connector (J17)
Display
Expansion
Connectors
(J1, J4)
JTAG/Trace
Connector
(J8)
3.5mm Audio
Connector
(Dual Stacked)
(J16)
USB3320C LAN9514
RJ-45 Connector +
2x-USB(A) Host Ports
(J9)
2
Generic
Expansion
Connectors
(J3, J6)
2
DVI-D
Connector
(P1)
LS Research
WL1271 Module
(WLAN, BT, FM)
RS-232 Female
9-pin D-Sub
(P4)
DC Input
Connector
(P3)
Input Power
Conditioning
Circuitry CLK32KAO
CLK32KAUDIO
CLK32KAUDIO
CLK32KG
CLK32KG
Composite
Video Header
(J12)
Figure 1 – OMAP4430 PandaBoard Architectural Block Diagram
.
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Mini-USB
(J18)
Camera
Expansion (J17) RS-232 UART3 (P4)
LCD
Expansion
(J1/J4)
Generic Expansion (J3/J6)
Figure 2 – OMAP4430 PandaBoard (Top View)
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2.2 System Clock Distribution
The OMAP4430 PandaBoard implements a 38.4 MHz 1.8V CMOS square-wave oscillator that directly
drives the FREF_SLICER_IN input (ball AG8) of the OMAP4430 processor and the MCLK input to the
TWL6040 Audio Companion IC. This clock is used as an input to the PLLs within the OMAP4430
processor so that it can generate all the internal clock frequencies required for system operation.
2.3 OMAP4430 Processor
The heart of PandaBoard is the OMAP4430 processor. The OMAP4430 high-performance multimedia
application device is based on enhanced OMAP™ architecture and uses 45-nm technology. For more
information, refer to the OMAP4430 Technical Reference Manual (TRM).The architecture is designed to
provide best-in-class video, image, and graphics processing sufficient to various applications. The device
supports the following functions:
•Streaming video up to full high definition (HD) (1920 × 1080 p, 30 fps)
•2-dimensional (2D)/3-dimensional (3D) mobile gaming
•Video conferencing
•High-resolution still image (up to 16 Mp)
The device supports high-level operating systems (OSs) such as:
•Windows™ CE, WinMobile™
•Symbian OS™
•Linux®
•Palm OS™
The device is composed of the following subsystems:
•Cortex™-A9 microprocessor unit (MPU) subsystem, including two ARM® Cortex-A9
cores
•Digital signal processor (DSP) subsystem
•Image and video accelerator high-definition (IVA-HD) subsystem
•Cortex™-M3 MPU subsystem, including two ARM Cortex-M3 microprocessors
•Display subsystem
•Audio back-end (ABE) subsystem
•Imaging subsystem (ISS), consisting of image signal processor (ISP) and still image
coprocessor (SIMCOP) block
•2D/3D graphic accelerator (SGX) subsystem
•Emulation (EMU) subsystem
The device includes state-of-art power-management techniques required for high-performance mobile
products. Comprehensive power management is integrated into the device. The device also integrates:
•On-chip memory
•External memory interfaces
•Memory management
•Level 3 (L3) and level 4 (L4) interconnects
•System and connecting peripherals
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2.4 TWL6030 Power Companion IC
The TWL6030 device is a small (7 x 7 mm, 0.4mm pitch) 256 ball FBGA that provides many functions
used on the Platform. Shown below is a feature list of the major functions/interfaces provided by the
TWL6030 device that are utilized on the Panda platform. This list below doesn’t include all device
functionality, just that which is used on the PandaBoard.
àA power management system (FSM)
à1 HS-I2C interface (≤2.4Mbits/s) for all Phoenix Power IC GP control commands (CTL-I2C)
à1 HS-I2C interface (≤2.4Mbits/s) for all Smart-Reflex Class 3 control commands (SR-I2C)
àMMC card detection mechanism
àA 24MHz RC oscillator
àA 32kHz RC oscillator for a fast device start-up
àA high-performance crystal oscillator, for 32.768kHz external crystal
àA Real Time Clock (RTC) resource
àPower supply resources:
o11 Low Drop Out (LDO) regulators
1 for internal purposes only (VRTC)
1 for internal and platform needs (VANA)
9 for platform needs (VAUX1, VAUX2, VAUX3, VCXIO, VDAC, VMMC,
VPP, VUSB, VUSIM)
o7 buck SMPS with:
DVS capability Smart-Reflex Class 3 compatible (VCORE1, VCORE2,
VCORE3)
1 for I/O supply (V1V8), with specific PWMFORCE input control
1 for LDOs pre-regulation (V2V1) and Phoenix Audio features
1 for memory supply (VMEM)
1 for external modem, RF transceiver or I/Os (V1V29)
à3 general-purpose enables for possible platform upgrades (REGEN1, REGEN2, SYSEN)
2.4.1 TWL6030 Core SMPS Outputs
The TWL6030 implements three Switch Mode Power Supplies (SMPS) that source the three main core
voltage rails for the OMAP4430 processor. The default voltage of all of these supplies is 0.95V, and each
should be adjusted as required by S/W for the desired processor OPP.
VCORE1 is a 1200mA SMPS that is used to power the VDD_MPU balls on the OMAP4430 processor
(net name VDD_VCORE1, 9 balls total). VCORE2 is a 600mA SMPS that is used to power the
VDD_IVA_AUDIO balls on the processor (net name VDD_VCORE2, 10 balls total). VCORE3 is a
600mA SMPS that is used to power the VDD_CORE balls on the processor (net name VDD_VCORE3,
34 balls total) and the VDDA_DLLn_LPDDR21 and VDDA_DLLn_LPDDR22, where n=0 and 1 (4 balls
total).
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OMAPTM 4 PandaBoard System
Reference Manual
Revision 0.4
September 22, 2010
DOC-21010
Page 19 of 83
2.4.2 TWL6030 V1V8 SMPS Output
The TWL6030 V1V8 SMPS provides the I/O voltage for the PandaBoard (net name VIO_1v8). This is a
1200mA SMPS that provides a 1.8V output that is used to power many balls on the OMAP4430
processor that set the I/O voltage for the device. It also sources onboard peripherals that require an
operating voltage referenced to processor I/Os.
2.4.3 TWL6030 V2V1 SMPS Output
The TWL6030 V2V1 SMPS output is used by the TWL6040 Audio Companion IC as an input for some
of its internal power supplies (specifically the high side and low side LDOs and the negative charge
pump). It is also connected to the TWL6030 as the input voltage to the VCXIO and VDAC LDOs (net
name VDD_2V1). It is a 600mA SMPS with a default output value of 2.10V.
2.4.4 TWL6030 VMEM SMPS Output
The TWL6030 VMEM output is a 600mA SMPS used to provide the operating voltage for the VDD2
LPDDR2 balls on the OMAP4430 processor (net name VDD_VMEM). These OMAP balls are feed-
throughs to the top POP footprint on the OMAP package, where they directly connect to the LPDDR2
VDD2 balls. This SMPS is a 600mA max capacity rail. The Micron LPDDR2 device used is an S4B
type device, so VDD2 is required to be 1.2V. This is set in the TWL6030 companion chip by connecting
the BOOT1 input to VRTC.
2.4.5 TWL6030 V1V29 SMPS Output
The TWL6030 V1V29 output is a 600mA SMPS used to provide the operating voltage for the VDD2
LPDDR2 balls on the OMAP4430 processor (net name VDD_VMEM). These OMAP balls are feed-
throughs to the top POP footprint on the OMAP package, where they directly connect to the LPDDR2
VDD2 balls. This SMPS is a 600mA max capacity rail. The Micron LPDDR2 device used is an S4B
type device, so VDD2 is required to be 1.2V. This is set in the TWL6030 companion chip by connecting
the BOOT1 input to VRTC, which causes V1V29 to be set to a default of 1.225V.
2.4.6 TWL6030 LDO Power Resources
The VAUX2 LDO is a programmable LDO that is only connected to pin 1 of the LCD Expansion
Connector J4. Its possible output voltage settings include 1.2V, 1.8V, 2.5V, 2.75V, and 2.8V, and its
maximum output current is 200mA. The voltage to be programmed will be dependent on the board
plugged into the LCD Expansion connectors, but will most likely be 2.8V.
The VAUX3 LDO is a programmable LDO that is only connected to pin 30 of the Camera Expansion
Connector, J17. Its possible output voltage settings include 1.0V, 1.2V, 1.3V, 1.8V, 2.5V, 2.8V, 3.0V,
and its maximum output current is 200mA. The output voltage to be utilized would depend on the
implementation of the camera module.
The VCXIO LDO is a fixed 1.8V, 200mA LDO that provides a 1.8V input to certain noise sensitive
OMAP4430 balls. The balls powered by this LDO include the VDDA_CSI2 balls (V28 and W28), the
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OMAPTM 4 PandaBoard System
Reference Manual
Revision 0.4
September 22, 2010
DOC-21010
Page 20 of 83
VDDA_DPLL balls (G13, P9 and Y16), and on this revision of the PandaBoard, the VDDS_DV_BANK7
ball (M28). This LDO also provides power for the onboard 38.4 MHz oscillator.
The VDAC LDO is a fixed 1.8V, 50mA LDO that provides a 1.8V input to certain noise sensitive
OMAP4430 balls. The balls powered by this LDO include the VDDA_HDMI_VDAC balls (A11 and
G12).
The VMMC LDO is a programmable LDO that provides the voltage to the VDDS_MMC1 balls on the
OMAP processor (pins G7 and H7) as well as the SDMMC cardcage. This LDO is off when the board is
powered on, but is turned on and set to 1.8V or 3.0V depending on card capabilities detected.
The VRTC LDO is an adjustable LDO that provides internal voltages to the TWL6030 device. Its
possible output voltage settings are 1.8V and 2.5V and its maximum output current is 25mA. In normal
operation, it should always be set to 1.8V.
The VUSB LDO is a fixed 3.3V, 35mA LDO that provides voltage to the OMAP4430 that it uses for its
internal USB transceiver. The only ball powered by this LDO is the VDDA_USBA0OTG_3P3V ball
(ball A5).
The VPP LDO is adjustable LDO that powers the VPP_CUST and VPP_STD balls on OMAP (balls J8
and Y22). This LDO is only needed for eFuse operations and can be left disabled for normal PandaBoard
operation.
2.4.7 TWL6030 Clock Circuitry
The TWL6030 has an 32.768 KHz crystal connected across its OSC32KIN and OSC32KOUT balls. This
crystal is used by the TWL6030 to generate three output 32.768 KHz, 1.8V square wave clock outputs.
These outputs are:
CLK32KAO: always on clock connected to the SYS32K input of the OMAP4430 processor.
CLK32KAUDIO: clock connected to the CLK32K input of the TWL6040 Audio Companion IC.
CLK32KG: a gated 32.768 clock connected to the SLOW_CLK input of the LS Research
module. This clock will be off by default at reset, and must be enabled by software.
2.5 TWL6040 Audio Companion IC
The TWL6040 device is a small (6 x 6 mm, 0.5mm pitch) 120 ball PBGA that provides many functions,
primarily audio, used on the Platform. Shown below is a feature list of the major functions/interfaces
provided by the TWL6040 device.
àA audio management system
oPDM Interface for Audio and control
oAnalog Microphone Interface
oHeadset – speaker (32 ohm) and microphone
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