User's Manual l STK-MBa53 UM 100 l © 2013 TQ-Group
Page 25
Table 29:
Pin assignment USB host 1 / 2 connector X9
Pin
Pin name
Signal
Dir.
Remark
U1_1
VBUS
USB_HOST1_VBUS (EMI filter )
P
100 µF to DGND
U1_2
D–
USBH1_D–
I/O
Additional common mode choke in series
U1_3
D+
I/O
Additional common mode choke in series
U1_4
Ground
DGND
P
–
M1
–
DGND
P
–
U2_1
VBUS
USB_HOST2_VBUS (EMI filter )
P
100 µF to DGND
U2_2
D–
USBH2_D–
I/O
Additional common mode choke in series
U2_3
D+
I/O
Additional common mode choke in series
U2_4
Ground
DGND
P
–
M1
8
–
DGND
P
–
# - low active signal, - element to VCC5V (pull-up), - element to ground (pull-down), - element in series
Table 30:
Pin assignment RJ45 receptacle X10 (Ethernet 2)
Pin
Name
Signal
Dir.
Remark
1
TX+
ETH2_TXP
O
–
2
TX–
ETH2_TXN
O
–
3
RX+
ETH2_RXP
I
–
4
–
VCC3V3A_ETH2 (10 Ω )
–
–
5
–
VCC3V3A_ETH2 (10 Ω )
–
–
6
RX–
ETH2_RXN
I
–
7
n.c.
n.c.
–
(Not used)
8
–
DGND
P
–
M1..2
–
DGND
P
–
A1 (9)
LED1 Anode
VCC3V3
–
Link Activity, green
(shines when connection is established, blinks during transfer)
K1 (10)
LED1 Cathode ETH2_LINKA# (270 Ω )
–
A2 (12)
LED2 Anode
VCC3V3
–
Speed Indicator, yellow
(shines at 100 Mbit/s, does not shine at 10 Mbit/s)
K2 (11)
LED2 Cathode ETH2_SPD# (270 Ω )
–
# - low active signal, - element to VCC5V (pull-up), - element to ground (pull-down), - element in series
Table 31:
Pin assignment USB host 3 pin header X19
Pin
Signal
Dir.
Remark
34
USBH3_VBUS
P
100 µF to DGND
36
USBH3_D–
I/O
Additional common mode choke in series
38
I/O
Additional common mode choke in series
# - low active signal, - element to VCC5V (pull-up), - element to ground (pull-down), - element in series
8
See USB-Host 1.
