Datasheet
page 24
v7
USB HOST
USB is the acronym for Universal Serial Bus. This is a very popular industry standard that denes cables, connectors and protocols used
for communication and power supply between computers and other devices. EasyPIC Fusion
™
v7 contains USB HOST connector (CN24) for USB
Standard Type A plug, which enables microcontrollers that support USB communication to establish a connection with the target device (eg. USB
Keyboard, USB Mouse, etc). USB host also provides the necessary 5V power supply to the target via TPS2041B IC. Detection whether USB device is connected
to HOST connector can be done through VBUS line. You can enable or disable USB device power supply connected to HOST via SW14.7 switch.
1
2
3
US B HOS T
CONNECTOR
VCC-5V
R34
47K
R36
10K
VCC-3.3V
USB-PSW
1
2
3
4
VCC
GND
D-
D+
CN24
USB A
E9
10uF
USB-D_N
USB-D_P
OUT
GND
IN
5
4
OCEN
U5
TPS2041B
VCC-3.3V
LD71
R31
4K7
E10
10uF
Q2
BC846
R41
10K
LD72
R32
2K2
VCC-5V
D1
BAT43
R40
220
USB-VBUS
ONOC
1 2 3 4 5 6 7 8
O
N
SW14
RB5
DATA BUS
communication
Figure 10-1: USB host
connection schematic