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REF: BB_SRM_xM BeagleBoard-xM System
Reference Manual
Revision A2
Page 111 of 164
8.26 Auxiliary Expansion Header
New to the –xM version is the addition of expansion header called the Auxiliary
Expansion Header. As is the case with many of the signals on the various connectors,
these pins have multiple functions mapped per pin. Table 26 below is the pin out of the
MMC Connector. In order to access other signals on these pins, the pin muxing register
will need to be set as needed on a per pin basis.
Table 26. P13 Auxiliary Expansion Signals
The following sections provide a brief description of the functions of the pins available.
For a more complete description, please refer to the datasheet or Technical Reference
Manuals. Not all of these signals can be used at the same time. Only one signal can be
used per pin at one time based on the setting of the pin mux registers in the processor.
Make sure that you set the correct mux mode when using these signals for their various
configurations.
8.26.1 MCBSP5 Signals
Access to McBSP5 is provided as an option on the connector. Table 27 below shows the
pins that the McBSP5 interface appears on. In order to se these signals, the mux mode for
each pin must be set to 1.
Table 27. P13 McBSP5 Expansion Signals
PIN SIGNAL PROC 0 1 2 3 4 5
1 VIO_1V8
2 VMMC2
3 MMC3_DAT2 AF13 ETK_D6 MCBSP5_DX MMC3_DAT2 HSUSB1_D6 GPIO_20
4 MMC3_DAT7 AH14 ETK_D7 MCSPI3_CS1 MMC3_DAT7 HSUSB1_D3 GPIO_21 MM1_TXEN_N
5 MMC3_DAT3 AE13 ETK_D3 MCSPI3_CLK MMC3_DAT3 HSUSB_D7 GPIO_17
6 GPIO_16 AH12 ETK_D2 MCSPI3_CS0 HSUSB1_D2 GPIO_16 MM1_TXDAT
7 GPIO_15 AG12 ETK_D1 MCBSPI3_SOMI HSUSB1_D1 GPIO_15 MM1_TXSE0
8 MMC3_DAT1 AH9 ETK_D5 MCBSP5_FSX MMC3_DAT1 HSUSB1_D5 GPIO_19
9 MMC3_DAT5 AG9 ETK_D9 SERCURE_IND MMC3_DAT5 HSUSB1_NXT GPIO_23 MM1_RX
10 MMC3_DAT4 AF11 ETK_D0 MCSPI3_SIMO MMC3_DAT4 HSUSB1_D0 GPIO_14 MM1_RXRCV
11 MMC3_DAT0 AE11 ETK_D4 MCBSP5_DR MMC3_DAT0 HSUSB1_D4 GPIO_18
12 MMC3_CMD AE10 ETK_CTL MMC3_CMD HSUSB1_CLK GPIO_13
13 MMC3_DAT6 AF9 ETK_D8 DRM_SECURE MMC3_DAT6 HSUSB1_DIT GPIO_22
14 MMC3_CLK AF10- ETK_CLK MCBSP5_CLKX MMC3_CLK HSUSB1_STP GPIO_12 MM1_RXDP
15 HDQ J25 HDQ SYS_ALTCLK GPIO_170
16 DMAREQ3 P8 DMAREQ3 GPT11_PWM GPIO_57
17 AUX_DC AUX_ADC
18 PWR_CNTRL PWR_CNTRL
19 GND
20 GND
PIN SIGNAL I/O DESCRIPTION PROC PINS
3
MCBSP5_DX O Transmitted Data AF13
8
MCBSP5_FSX O Frame Sync AH9
11
MCBSP5_DR I Received Data AE11
14
MCBSP5_CLKX O Serial Clock AF10-
- BeagleBoard-xM Rev A2 1
- System Reference Manual 1
- Table of Contents 5
- Figures 9
- Tables 11
- 1.0 Introduction 13
- 2.0 Change History 15
- 2.2.2 Software Changes 16
- 4.0 BeagleBoard Overview 17
- Figure 2. USB Y-Cable 21
- 6.0 Product Contents 28
- 7.0 BeagleBoard Hookup 30
- BEAGLEBOARD 36
- VOLT_ERR 45
- 8.2.1 Detection 46
- 8.2.2 Indication 46
- 8.2.3 Shutdown 46
- USB_CLIENT / 47
- OTG PORT 47
- DC_POWER 47
- 8.3.1 USB DC Source 48
- 8.3.2 Wall Supply Source 48
- 8.3.3 DC Source Control 48
- 8.3.4 AUX 3.3V Supply 49
- Figure 25. Main Power Rails 55
- 8.7.6 VOCORE_1V3 56
- 8.7.7 VDD2 56
- 8.8.1 VDD_PLL2 57
- 8.8.2 VDD_PLL1 58
- 8.8.3 VDAC_1V8 58
- 8.8.10 EXP_VDD 60
- 8.9.1 Boot Configuration 60
- 8.9.2 RTC Backup Battery 60
- 8.9.3 Power Sequencing 61
- Figure 27. Power Sequencing 61
- 8.9.4.3 User Reset 63
- 8.9.4.4 PWRON 63
- 8.9.5 mSecure Signal 63
- 8.10.1 Overview 64
- 8.10.2 SDRAM Bus 65
- 8.10.3 GPMC Bus 65
- Processor 66
- 8.10.9 GPIO Mapping 69
- 8.10.10 Interrupt Mapping 69
- Figure 33. POP Memory 70
- Figure 34. System Clocks 70
- 8.12.1 32KHz Clock 71
- 8.12.2 26MHz Clock 71
- 8.12.2.1 26MHz Source 71
- 8.12.2.2 TPS65950 Setup 71
- 8.12.2.3 Processor 26MHz 71
- 8.12.3 McBSP_CLKS 72
- 8.13.1 USB OTG Overview 72
- 8.13.2 USB OTG Design 73
- Figure 35. USB OTG Design 73
- 8.13.3 OTG ULPI Interface 73
- 8.13.3.2 TPS65950 Interface 74
- 8.13.4 OTG Charge Pump 74
- 8.13.5 OTG USB Connector 75
- 8.13.6 OTG USB Protection 75
- 8.14.1 Power 76
- 8.14.2 HS USB PHY 77
- Figure 38. USB PHY Design 78
- 8.14.3 USB HUB 79
- Figure 39. USB HUB Design 80
- 8.14.4 USB Port Connectors 81
- 8.14.5 Ethernet 82
- 8.15.1 microSD Power 83
- 8.15.2 Processor Interface 83
- 8.15.3 Card Detect 84
- Figure 43. Audio Circuitry 85
- 8.16.3 Audio Output Jack 86
- 8.16.4 Audio Input Jack 86
- Figure 44. DVI-D Interface 87
- 8.17.2 LCD Power 89
- 8.17.3 TFP410 Power 89
- 8.17.4 TFP410 Framer 89
- 8.17.6.8 DVI to VGA 93
- Table 16. P11 LCD Signals 93
- Table 17. P13 LCD Signals 94
- 8.20.4 Camera Modules 100
- Figure 47. Camera Modules 100
- 8.21.1 Processor Interface 101
- 8.21.2 Level Translator 101
- 8.21.3 RS232 Transceiver 102
- 8.21.4 Connector 102
- 8.22.1 Power Indicator 103
- 8.22.2 PMU Status Indicator 103
- Figure 49. Indicator Design 103
- 8.22.3 User Indicators 104
- 8.22.4 HUB Power Indicator 104
- Figure 50. JTAG Interface 105
- 8.23.1 Processor Interface 105
- Table 21. JTAG Signals 105
- 8.23.2 JTAG Connector 106
- 8.24.1 Processor Interface 106
- 8.24.2 Expansion Signals 108
- 8.24.3 Power 109
- 8.24.4 Reset 109
- 8.24.5 Power Control 109
- Table 24. P11 GPIO Signals 110
- MUX:0 MUX:2 MUX:4 110
- Table 25. P13 GPIO Signals 110
- 8.26.1 MCBSP5 Signals 111
- 8.26.2 MMC3 Signals 112
- 8.26.3 ETK Signals 112
- 8.26.4 HSUSB1 Signals 113
- 8.26.5 Alternate Clock 113
- 8.26.6 HDQ 1-Wire 113
- 8.26.7 ADC 113
- 8.26.8 GPIO Signals 114
- 8.26.9 DMAREQ 114
- Figure 52. Power Connector 115
- Figure 56. DVI-D Connector 118
- DVI-D interface itself 118
- Figure 57. DVI-D Cable 119
- Figure 58. DVI-D Cable 119
- 9.5.1 Connector Pinout 120
- Table 33. P11 LCD Signals 120
- Table 34. P13 LCD Signals 121
- 9.5.2 Camera 122
- Figure 60. Camera Connector 123
- Figure 61. Camera Module 123
- 9.5.3 Audio McBSP2 Port 124
- 9.5.6 Mounting Scenarios 127
- Figure 66. Audio In Plug 128
- Figure 68. Audio Out Plug 129
- Table 39. JTAG Signals 130
- 9.9.1 Battery 132
- Figure 73. Optional Battery 132
- 9.9.2 Battery Installation 132
- Figure 75. Resistor R65 133
- Table 41. DC Power Supplies 135
- Figure 76. DC Power Supply 135
- Figure 79. USB to Bluetooth 138
- 11.0 Mechanical Information 140
- 11.2.1 Mounting Method 141
- 11.2.2 Expansion EEPROM 143
- Table 46. Voltages 145
- 12.1.1 Signal Access Points 146
- Table 47. Troubleshooting 147
- 13.0 Known Issues 148
- 15.0 Schematics 151
- 16.0 Bills of Material 163
- 17.0 PCB Information 164
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