Ampro Corporation P5X Benutzerhandbuch
Little Board/P5x Technical Manual
2–51
Utility Connectors (J16, J24)
Seven functions appear on Utility 1, a 16-pin connector at J16. These are:
!
Auxiliary power connections
!
Power indicator LED
!
PC speaker
!
Push-button reset switch
!
Keyboard interface
!
External back-up battery
Table 2– 38 shows the pinout and signal definitions of the Utility Connector. Since there are
connections for diverse features on this single connector, you would usually choose a discrete-wire
connector rather than a ribbon cable connector, though this is not a requirement. Table 2– 39 shows
manufacturer’s part numbers for both types of mating connectors.
connections for diverse features on this single connector, you would usually choose a discrete-wire
connector rather than a ribbon cable connector, though this is not a requirement. Table 2– 39 shows
manufacturer’s part numbers for both types of mating connectors.
Table 2– 38. Utility Connector (J16)
Pin
Signal Name
Function
1
-12V power
Connect external -12V supply here for distribution to
expansion cards needing this voltage.
2
Ground
Ground return
3
-5V power
Connect external -5V supply here for distribution to
expansion cards needing this voltage.
4
Ground
Ground return
5
LED Anode
LED current source (+5V through 330 ohms)
6
RSVD
No connection
7
Speaker +
PC audio signal output
8
Ground
Ground
9
Reset
To one side of manual reset button.
10
N/C
Reserved
11
Kbd Data
Keyboard serial data
12
Kbd Clk
Keyboard clock
13
Ground
Keyboard ground
14
Kbd Power
Keyboard +5V power
15
+ Bat
+ Battery *
16
Ground
- Battery *
* An external battery is not required.