MIKROE-972 mikroElektronika, MIKROE-972 Datasheet - Page 25

• Manufacturer Part Number: MIKROE-972
• Description: Development Boards & Kits - ARM EASYMX PRO v7 ARM STELLARIS CORTEX-M3
• Manufacturer: mikroElektronika

Specifications of MIKROE-972

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: LM3S9B95
• Core: ARM Cortex M3
• Interface Type: CAN, I2C, SPI
• Operating Supply Voltage: 7 VAC to 23 VAC, 9 VDC to 32 VDC

EasyMx PRO
PB1
USB-D_P
PB1
11
13
15
17
19
21
23
25
1
3
5
7
9
SW10
2
4
6
8
10
12
14
16
18
20
22
24
26
USB-D_N
v7
USB-VBUS
USB-D_N
USB-D_P
Figure 11-1: USB device connection
schematic
R1
R40
R43
LD9
ON
100
27
27
R46
4K7
GND
GND
VCC
D-
D+
GND
1
2
3
4
CN10
USB B
USB device
communication
EasyMx PRO
contains USB DEVICE connector (CN10)
which enables microcontrollers that
support USB communication to establish
a connection with the target host (eg. PC,
Laptop, etc). It lets you build a slave USB
device (HID, Composite, Generic, etc.).
Connector supports USB Standard Type
B plug. Detection whether USB DEVICE
is connected to HOST can be done
through VBUS line. This line is traced
to microcontroller PB1 pin. Connection
of USB DEVICE VCC line and PB1 pin is
established when SW10.8 DIP switch is
in ON position. When connected to HOST,
dedicated amber-colored power LED will
light up as well. This VCC line cannot be
used for powering the board. It's only
used for detecting connection.
™
v7 for Stellaris
®
also
Detecting connection
You can detect whether USB device
is plugged into the connector using
VBUS power detection line (PB1).
Before using this feature, you must
connect PB1 pin to USB connector
using SW10.8 switch.
Figure 11-2:
enabling
USB DEVICE
detection
via VBUS
line
page 25