Manual

KTD-S0051-D Page 35 Power Supply
KTAM3874/pITX User's Guide
15 Power Supply
The KTAM3874/pITX SBC has a power input voltage range from +4.75V to +5.25V DC. All other voltages are
generated onboard (e.g. +3.3V / +1.8V system voltage).
15.1 DC Power Connector
The power supply is injected through the connector J2101 (3 pins, DC power jacket 2.1mm).
Header Pin Signal Description
1
VCC_IN
1)
DC power supply input +5V
2 GND Ground
1
3 GND Ground
15.2 External Power Connector
The connector J2100 (20 pins) can also be used to power the board instead of the round power jacket. In
any case the green sections should be connected together (pin 13 with pin 14, pin 15 with pin 16 and pin
17 with pin 18).
Header Pin Signal Description Type
1 GND Ground PWR
2 GND Ground PWR
3 I2C_SDA I
2
C
TM
data IO-50
4 I2C_SCL I
2
C
TM
clock IO-50
5 RSVD Reserved for future use ---
6 RSVD Reserved for future use ---
7 GND Ground PWR
8 GND Ground PWR
9
VDD
1)
External backlight voltage input PWR IN
10 VCC5 Onboard power +5V PWR
11
VDD
1)
External backlight voltage input PWR IN
12 VCC5 Onboard power +5V PWR
13
VCC_IN
1)
DC power supply input +5V PWR IN
14 VCC5 Onboard power +5V PWR
15
VCC_IN
1)
DC power supply input +5V PWR IN
16 VCC5 Onboard power +5V PWR
17
VCC_IN
1)
DC power supply input +5V PWR IN
18 VCC5 Onboard power +5V PWR
19 RSVD Reserved for future use ---
12
1920
20 RSVD Reserved for future use ---