User Manuals: BeagleBone A4 Development Board

Manuals and User Guides for BeagleBone A4 Development Board. We have 1 BeagleBone A4 Development Board manual available for free PDF download: System Reference Manual

BeagleBone A4 System Reference Manual (92 pages)

Brand: BeagleBone | Category: Motherboard | Size: 3 MB

Table of Contents
6
Figures
9
Tables
10
Introduction
11
Change History
12
Table 1. Change History
12
Rev A5 Vs. A6
13
PCB Changes
13
Design Changes
13
Rev A4 Vs. A5
14
PCB Changes
14
Design Changes
14
Production Changes
14
Rev A3 Vs. A4
15
PCB Changes
15
Design Changes
15
Known Issues
15
Beaglebone Overview
16
Beaglebone Expansion
16
Beaglebone Design Material
16
In the Box
16
Beaglebone Features and Specification
17
Table 2. Beaglebone Features
17
Board Component Locations
18
Figure 1. Top Side Components
18
Figure 2. Bottom Side Components
19
Board Connector and Indicator Locations
20
Figure 3. Board Connector and Indicators
20
Beaglebone Design Specification
21
Processor
21
Memory
21
Power Management
21
Pc Usb Interface
21
Serial Debug Port
21
JTAG Port
22
USB0 Port
22
Microsd Connector
22
Usb1 Port
22
Usb Client Port
22
Power Sources
22
Reset Button
23
Indicators
23
Cti Jtag Header
23
Expansion Interface
24
Main Board Expansion Header
24
Cape Expansion Boards
24
Figure 4. Main Board Expansion Connector
24
Exposed Functions
25
Lcd
25
Gpmc
25
Mmc1
25
Spi
25
I2C
26
Serial Ports
26
A/D Converters
26
Gpio
26
CAN Bus
26
5.3.10 Timers
26
5.3.11 Pwm
26
Detailed Board Design
28
System Block Diagram
28
Processor
28
Figure 5. System Block Diagram
28
Processor Block Diagram
29
Figure 6. Processor Block Diagram
29
System Power
30
Tps65217B Pmic
30
Figure 7. Power Subsection Block Diagram
30
Figure 8. TPS65217B Block Diagram
32
5V DC Power Input
33
USB Power
33
Figure 9. 5V DC Power Input
33
Power Source Selection
34
Power Consumption
34
Figure 10. USB Power Input
34
Table 3. Beaglebone Power Consumption(Ma@5V)
34
Power Sequencing
35
TPS65217B Power up
35
Figure 11. Power Sequencing
35
Voltage Rails
36
Figure 12. RTC_PORZ Control
36
Power Indicator LED
37
6.3.10 Expansion 3.3V LDO
38
Current Measurement
38
SYS_5V Connection
38
Figure 13. Expansion 3.3V Regulator
38
SYS_VOLT Connection
39
MUX_OUT Connection
39
Current Calculation
39
Figure 14. Current Measurement
39
Two Port Usb Hub
40
Processor USB Port
40
HUB Power
40
Figure 15. USB HUB Design
40
Crystal and Reset
41
FT2232H Serial Adapter
41
Processor USB Port
41
Ft2232H Usb to Serial Adapter
42
Eeprom
42
Figure 16. FT2232H Design
42
Jtag
43
Serial Port
43
256Mb Ddr2 Memory
43
Table 4. DDR Addressing
43
DDR 2 Design
44
Figure 17. DDR Device Block Diagram
44
Figure 18. DDR Design
44
DDR VTP Termination Resistor
45
User Leds
45
Figure 19. User LEDS
45
10/100 Ethernet
46
Ethernet PHY Design
46
Table 5. User LED Control
46
Processor Signal Description
47
Figure 20. 10/100 Ethernet PHY Design
47
Table 6. Processor Ethernet Signals
47
Clocking Mode
48
PHY Mode
48
Figure 21. 10/100 Ethernet PHY Default Settings
48
MDIO Interface
49
PHY Reset
49
Status Leds
49
Power
49
Usb Host
50
USB Host Design
50
Figure 22. USB Host Design
50
Sd Connector
51
Eeprom
51
Figure 23. SD Connector Design
51
Figure 24. EEPROM Design Rev A3,A4, and A5
52
Table 7. EEPROM Contents
52
Adc Interface
53
6.12.1 ADC Inputs
53
6.12.2 VDD_ADC Interface
53
Figure 25. EEPROM Design Rev A6
53
Expansion Headers
54
6.13.1 Expansion Header P8
54
Table 8. Expansion Header P8 Pinout
54
6.13.2 P8 Signal Pin Mux Options
55
Table 9. P8 Mux Options Modes 0-3
55
Table 10. P8 Mux Options Modes 4-7
57
6.13.3 Expansion Header P9
59
Table 11. Expansion Header P9 Pinout
59
Table 12. P9 Mux Options Modes 0-3
60
Table 13. P9 Mux Options Modes 4-7
62
6.13.4 PMIC Expansion Header
64
6.13.5 Backlight Interface
64
Figure 26. PMIC Expansion Header
64
Figure 27. Backlight Circuitry
64
6.13.6 Battery Interface
65
Figure 28. Battery Circuitry
65
Cape Board Support
66
Eeprom
66
EEPROM Address
67
I2C Bus
67
Figure 29. Expansion Board EEPROM no Write Protect
67
EEPROM Write Protect
68
Figure 30. Expansion Board EEPROM Write Protect
68
EEPROM Data Format
69
Table 14. Expansion Board EEPROM
69
Pin Usage
70
Table 15. EEPROM Pin Usage
71
Pin Usage Consideration
74
Boot Pins
74
Figure 31. Expansion Boot Pins
74
Expansion Connectors
75
Non-Stacking Headers-Single Cape
75
Figure 32. Single Expansion Connector
75
Battery Connector- Single
76
Figure 33. Single Cape Expansion Connector
76
Table 16. Single Cape Connectors
76
Main Expansion Headers-Stacking
77
Figure 34. Battery/Backlight Expansion Connector
77
Figure 35. Expansion Connector
77
Table 17. Single Cape Backlight Connectors
77
Battery Connector Stacking
78
Figure 36. Stacked Cape Expansion Connector
78
Table 18. Stacked Cape Connectors
78
Stacked Capes W/Signal Stealing
79
Retention Force
79
Figure 37. Stacked Battery Expansion Connector
79
Figure 38. Stacked W/Signal Stealing Expansion Connector
79
Table 19. Stacked Cape Connectors
79
Beaglebone Female Connectors
80
Signal Usage
80
Figure 39. Connector Pin Insertion Depth
80
Cape Power
81
Main Board Power
81
Table 20. Expansion Voltages
81
Expansion Board External Power
82
Mechanical
82
Standard Cape Size
82
Extended Cape Size
83
Figure 40. Cape Board Dimensions
83
Enclosures
84
Board Setup
85
Creatinga Sd Card
85
Usb Powered Setup
85
DC Powered Setup
86
Advanced Test
86
Equipment Needed
87
Procedure
87
Debugging
87
Software Support
88
Tutorials
88
Reinstalling the Angstrom Image
88
Rebuilding the Angstrom Image
89
10.0 Beaglebone Mechanical Specification
91
Figure 41. Board Top Profile
91
Figure 42. Board Bottom Profile
91
11.0 Design Information
92

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