Difference between revisions of "X708-Hardware"
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Revision as of 09:06, 7 June 2021
❶ 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(Max.) |
Power output connector | 2-pin XH2.54mm *2 |
- 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
❷ 6-Pin Function Header
Jumper Name | Usage |
---|---|
PLD
(Power loss detection) Pin 1&2 |
|
AON
(Auto power-on) Pin 3&4 |
|
ASD
(Auto shutdown) Pin 5&6 |
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.
|
❸ 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 |
❹ 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 |
❺ 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 |
❻ 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 |
❼ 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) |
❽ 18650 battery dimension
Please use 18650 battery with built-in protection circuit
❾ How to programming to get ASD function on V1.2 version
The following is fake C/C++ code:
while(1) { // You need to implement getCurrentVoltage function float fVoltage = getCurrentVoltage(); if (fVoltage <= 2.5) { //execute shut down command, "sudo x708off" break; } }Return to X708Enable comment auto-refresherAnonymous user #814 months agoScore 0Permalink |Walker14 months agoScore 0PermalinkAnonymous user #1520 months agoScore 0Permalink |Lisa20 months agoScore 0PermalinkAnonymous user #1520 months agoScore 0Permalink |Lisa20 months agoScore 0PermalinkAnonymous user #1620 months agoScore 0PermalinkLisa20 months agoScore 0PermalinkAnonymous user #1420 months agoScore 0Permalink |Anonymous user #1320 months agoScore 0PermalinkAnonymous user #1420 months agoScore 0PermalinkAnonymous user #1320 months agoScore 0Permalink |Lisa20 months agoScore 0PermalinkAnonymous user #1222 months agoScore 0Permalink |Lisa22 months agoScore 0PermalinkAnonymous user #1025 months agoScore 0Permalink |Lisa25 months agoScore 0PermalinkAnonymous user #1026 months agoScore 0Permalink |Lisa26 months agoScore 0PermalinkLisa26 months agoScore 0PermalinkAnonymous user #1025 months agoScore 0PermalinkLisa25 months agoScore 0PermalinkAnonymous user #927 months agoScore 0Permalink |Lisa27 months agoScore 0PermalinkAnonymous user #828 months agoScore 0Permalink |Lisa28 months agoScore 0PermalinkAnonymous user #731 months agoScore 0Permalink |Anonymous user #344 months agoScore 0Permalink |Anonymous user #444 months agoScore 0PermalinkAnonymous user #544 months agoScore 0PermalinkAnonymous user #544 months agoScore 0PermalinkXiali43 months agoScore 0PermalinkAnonymous user #245 months agoScore 0Permalink |Anonymous user #544 months agoScore 0PermalinkAnonymous user #643 months agoScore 0PermalinkAnonymous user #1123 months agoScore 0PermalinkAnonymous user #145 months agoScore 0Permalink |