Kontron SMARC-sA3874i Manual de usuario Pagina 26
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User’s Guide
3.2.12 USB Interfaces
The Kontron sA3874i module supports two USB ports (USB 0:1). Per the ULP-COM specification, the Kontron
sA3874i USB0 port is capable of functioning either as a client or host device. The sA3874i module also supports
one additional USB2.0 host port, on ULP-COM USB1. This product does not implement the optional third USB
interface defined in the ULP-COM spec.
USB interface signals are exposed on the ULP-COM sA3874i edge connector as shown below:
ULP-COM sA3874i Edge finger
TI Cortex A8 CPU
Net Name
Notes
Pin #
Pin Name
Pin #
Pin Name
USB0 Port
P60
USB0_P
AG11
USB0_DP
USB0+
USB0 port data
pair
P61
USB0_N
AH11
USB0_DM
USB0-
P63
USB0_VBUS_DET
AG12
USB0_VBUSIN
USB0_VBUS_DET
USB host power
detection, when
this port is used
as a device.
P64
USB0_OTG_ID
AG10
USB0_ID
USB0_OTG_ID
USB OTG ID
input, active
high
USB1 Port
P65
USB1_P
AG13
USB1_DP
USB1+
USB1 port data
pair
P66
USB1_N
AH13
USB1_DM
USB1-
The ULP-COM Hardware specification defines USBx_EN_OC# (where x is 0 and 1 for use with USB0 and USB1) pins
as multifunction pins to use for power enable of USBx ports, as well as for over current indication. The ULP-COM
sA3874i complies with this definition. These nets are provided with pull up resistors on the Module. The Module
CPLD contains the glue logic required for this implementation.
The sA3874i Module USB power-enable and over-current indication logic implementation is shown in the following
block diagram. There are 10K pull-up resistors on the Module on the ULP-COM USBx_EN_OC# lines. The CPLD
outputs driving the USBx_EN_OC# lines are open-drain. The Carrier board USB power switch, if present, is enabled
by virtue of the 10K Module pull-up to 3.3V.
- » User Guide « 1
- » Table of Contents « 2
- » Table of Figures « 5
- 1 User Information 6
- 1.6 Technical Support 7
- 2 Introduction 8
- 2.3.2 Kontron Documents 10
- 2.3.3 Kontron Schematics 10
- 2.3.6 Kontron Software BSP 10
- 3 Specifications 11
- User’s Guide 12
- 3.2.5 On-board Storage 13
- 3.2.6 Clocks 13
- 3.2.2 Form Factor 13
- 3.2.3 CPU 13
- 3.2.4 Module Memory 13
- EDGE FINGER 17
- Not Used 21
- 3.2.12 USB Interfaces 26
- 3.2.13 PCIe Interface 29
- 3.2.14 SATA Interface 30
- 3.2.16 SDIO Interface 34
- 3.2.18 SPI Interfaces 36
- 3.2.19 I2S Interfaces 37
- 3.2.20 SPDIF Interface 38
- 3.2.22 CAN Interface 40
- 3.2.23 I2C Interface 41
- 3.3 ULP-COM sA3874i Debug 43
- 3.4.1 Module Dimensions 44
- 3.4.2 Height on Top 44
- 3.4.3 Height on Bottom 44
- 3.4.4 Layout Diagrams 44
- 3.5.1 Supply Voltage 47
- 3.5.2 RTC/Backup Voltage 47
- 3.5.4 Module I/O Voltage 47
- 3.5.5 Power Consumption 48
- 3.6.1 Operating Temperature 49
- 3.6.2 Humidity 49
- 3.6.3 RoHS Compliance 49
- 4 Connectors 50
- 4.2 JTAG 64
- 5.1 Watchdog Timer 67
- 5.2 PMU GPIO 67
- 5.3 ULP-COM sA3874i I/O 68
- 5.4 Temperature Sensor 71
- 5.6 Board ID EEPROM 71
- 6.1 Thermal Management 72
- 6.3 Thermal Parameters 73
- 7 ULP-COM sA3874i Software 74
- 8.2 BOOT Selection 76
- 9.2 SPI Programming 77
- 9.3 eMMC Programming 77
- SN65LVDS93A BGA56 78
- SN65LVDS93AZQLR 78
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