Kt690 family, Power connector (atxpwr) – Kontron KT690-mITX (BGA) - dual core User Manual
Page 30
KT690 Family
KTD-00738-J
Public User Manual
Date 2012-06-01
Page
30
Power Connector (ATXPWR)
The KT690 boards are designed to be supplied from a standard ATX or BTX power supply.
ATX/ BTX Power Connector:
Note
Pull
U/D
Ioh/Iol
Type
Signal
PIN
Signal
Type
Ioh/Iol
Pull
U/D
Note
-
-
PWR
3V3
12 24
GND
PWR
-
-
PWR
+12V
11 23
5V
PWR
PWR
+12V
10 22
5V
PWR
-
-
PWR
SB5V
9
21
5V
PWR
-
-
-
-
I
P_OK
8
20
-5V
PWR
-
-
1
-
-
PWR
GND
7
19
GND
PWR
-
-
-
-
PWR
5V
6
18
GND
PWR
-
-
-
-
PWR
GND
5
17
GND
PWR
-
-
-
-
PWR
5V
4
16 PSON#
OC
-
-
-
-
PWR
GND
3
15
GND
PWR
-
-
-
-
PWR
3V3
2
14
-12V
PWR
-
-
-
-
PWR
3V3
1
13
3V3
PWR
-
-
Note 1: -5V supply is not used onboard.
Note 2: Use of BTX supply not required for operation, but may be required to drive high-power PCI Express
x16 Add cards.
ATX+12V Power Connector:
Note
Pull
U/D
Ioh/Iol
Type
Signal
PIN
Signal
Type
Ioh/Iol
Pull
U/D
Note
1
-
-
PWR
GND
1
3
+12V
PWR
-
-
1
1
PWR
GND
2
4
+12V
PWR
1
Note 1: Use of the 4-pin ATX+12V Power Connector is required for operation of the KT690 boards.
See chapter “Power Consumption” regarding input tolerances on 3.3V, 5V, SB5V, +12 and -12V (also refer
to ATX specification version 2.2).
Control signal description:
Signal
Description
P_OK
P_OK is a power good signal and should be asserted high by the power supply to indicate
that the +5VDC and +3.3VDC outputs are above the undervoltage thresholds of the power
supply. When this signal is asserted high, there should be sufficient energy stored by the
converter to guarantee continuous power operation within specification. Conversely, when the
output voltages fall below the undervoltage threshold, or when mains power has been
removed for a time sufficiently long so that power supply operation is no longer guaranteed,
P_OK should be de-asserted to a low state. The recommended electrical and timing
characteristics of the P_OK (PWR_OK) signal are provided in the ATX12V Power
SupplyDesign Guide.
It is strongly recommended to use an ATX or BTX supply with the KT690 boards, in order to
implement the supervision of the 5V and 3V3 supplies. These supplies are not supervised
onboard the KT690 boards.
PS_ON#
Active low open drain signal from the board to the power supply to turn on the power supply
outputs. Signal must be pulled high by the power supply.