mITX-BW – User Guide, Rev. 1.6
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// 40
Pin
Signal
Type
Ioh / Iol
Pull U / D
Note
5
US
6
US
7
GND
PWR
8
GND
PWR
9
NC
NC
10
LINE2-L
11
+5 V
PWR
12
+5 V
PWR
13
SATA_LED#
O
25 / 25 mA
14
SUS_LED
O
7 mA
15
GND
PWR
16
PWRBTN_IN#
I
1.1 kΩ
17
RSTIN#
I
4.7 kΩ
18
GND
PWR
19
SB3V3
PWR
20
LINE2-R
21
AGND
PWR
22
AGND
PWR
23
MIC2-L
AI
24
MIC2-R
AI
Table 34: Signal description
Signal
Description
USB_PWR_ D2/
USB_PWR_ D3
5 V supply for external devices. SB5V is supplied during powerdown to allowwakeup on USB
device activity. Protected by active power switch 1 A fuse for each USB port.
USBhub_D2-/+
Universal Serial Bus Differentials: Bus Data/Address/Command Bus.
USBhub_D3-/+
Universal Serial Bus Differentials: Bus Data/Address/Command Bus.
+5 V
Maximum load per pin is 1 A (using IDC connector) or 2 A (using crimp terminals).
SATA_LED#
SATA Activity LED (active low signal). 3V3 output when passive.
SUS_LED
Suspend Mode LED (active high signal). Output 3.3 V via 470Ω.
PWRBTN_IN#
Power Button In. Toggle this signal low to start the ATX / BTX PSU and boot the board.
RSTIN#
Reset Input. When pulled low for a minimum 16ms, the reset process will be initiated.
The reset process continues even though the Reset Input is kept low.
LINE2
Line2 is second stereo Line signals
MIC2
MIC2 is second stereo microphone input.
SB3V3
Standby 3.3 V voltage
AGND
Analogue Ground for Audio
