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KTD-S0051-D
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Power Supply
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
1
15.2
Pin
Signal
Description
1
VCC_IN 1)
DC power supply input +5V
2
GND
Ground
3
GND
Ground
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
2
1
Pin
Signal
Description
Type
1
GND
Ground
PWR
2
GND
Ground
PWR
3
20
19
I2C_SDA
2 TM
IO-50
2 TM
I C data
4
I2C_SCL
I C 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
---
20
RSVD
Reserved for future use
---
KTAM3874/pITX User's Guide