1. Power Jack and Connectors
Power input |
5Vdc +/- 5% , ≥3A
|
DC Power Plug Size |
5.5*2.5mm
|
USB power in socket |
Type-C
|
UPS power output |
5.1Vdc 8A
|
Power output connector |
XH2.54mm 2pin
|
- X708 powers the Raspberry Pi via the 40-pin header (Pin 2 & 4)
- Don't power the Raspberry Pi via the Pi's type-C USB socket
- X708 can be powered via the onboard DC jack or Type-C USB power socket
2. 6-Pin Function Header
Jumper Name |
Usage
|
PLD
(Power loss detection)
Pin 1&2
|
- Short - AC Power loss or power adapter failure detection enabled (Active if power adapter disconnected)
- Open - Power loss detection disabled
|
AON
(Auto power-on)
Pin 3&4
|
- Short - Auto power-on when power applied (Will delay 3 seconds before powering on)
- Open - Auto power-on disabled
|
ASD
(Auto shutdown)
Pin 5&6
|
- Short - Automatic shutdown enabled when battery low (≤3Vdc )
- Procedure to enable ASD function --IMPORTANT
1. Battery voltage must be >3Vdc
2. Insert the battery into the holder
3. Wait 3 seconds then insert the jumper
4. If the jumper inserted before battery, remove battery & jumper then repeat step 1, 2 and 3.
- Open - Automatic shutdown disabled
|
3. How to connector external power switch
Pin No. |
Pin Description
|
1
|
Power on/off control connecting to switch
|
2
|
Ground
|
3
|
LED+ for battery low indicator
|
4
|
LED+ for power on, rebooting and shutdown
|
4. Power button (Script for power mgnt installed)
Press and Release |
Raspberry Pi and X708 turn on
|
Press and hold for 1~2 seconds
|
System rebooting
|
Press and hold for 3~7 seconds
|
System shutting down
|
Press and hold for >8 seconds
|
Force shutdown
|
5. Function LEDs
LED Name |
Usage
|
BAT
|
LOW
|
LED red on indicates battery low (≤3.0Vdc) or
|
blue power button pressed
|
(Jumper for ASD inserted)
|
5V
|
OUT
|
LED green on flashing indicates 5V power out
|
and UPS powered by battery
|
AC
|
FAIL
|
LED red on indicates AC power loss or PSU
|
failure or PSU disconnected
|
PWR
|
LED blue indicates
|
Stays on - Power on
|
Blinks rapidly - system rebooting
|
Blinks slowly - Shutting down
|
6. Fuel gauge - LED Indicator
Operation of Discharging
Capacity C (%) |
D1 |
D2 |
D3 |
D4
|
C ≥75% |
ON |
ON |
ON |
ON
|
50%≤C<75% |
ON |
ON |
ON |
OFF
|
25%≤C<50% |
ON |
ON |
OFF |
OFF
|
3%≤C<25% |
ON |
OFF |
OFF |
OFF
|
0%<C<3% |
Flashing |
OFF |
OFF |
OFF
|
Operation of charging
Capacity C (%) |
D1 |
D2 |
D3 |
D4
|
Fully charged |
ON |
ON |
ON |
ON
|
75%≤C |
ON |
ON |
ON |
Flashing
|
50%≤C<75% |
ON |
ON |
Flashing |
OFF
|
25%≤C<50% |
ON |
Flashing |
OFF |
OFF
|
C<25% |
Flashing |
OFF |
OFF |
OFF
|
7. Pins and GPIO used
Pin No. |
Usage
|
2, 4
|
+5V power supply
|
3, 5
|
I2C for RTC and battery fuel-gauge systems
|
6
|
Ground
|
29
|
GPIO5 for power management
|
32
|
GPIO12 for power management
|
33
|
GPIO13 for power management
|
31
|
GPIO6 for AC power loss detection
|
(Jumper for PLD inserted, High=power loss,
|
Low=Power supply normal)
|
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