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{{GD Template Impl}}
==Overview==
'''X728 V2.5'''
[[File:IMG-0449-interface-EN.jpg|800px|X728 V2.5]]
'''X728 V2.3'''
[[File:X728-V2.3-Interface-EN.jpg|800px|X728 V2.3]]
[[File:X728-V2.3-Jumper-cap-function.jpg|800px|X728 V2.3]]
'''X728 V2.1'''
[[File:X728-V2.1-interface-EN.jpg|X728 V2.1 Interface]]
Update:
*New add a buzzer controled by GPIO20
*DC jack is changed from DC5525 to DC5521.
'''X728 V2.0'''
[[File:X728-V2.0-01.jpg|700px|none|X728 V2.0]][[File:X728-V2.0-02.jpg|700px|none|X728 V2.0]]
Update:
* PIN33 (GPIO13) is replaced by the PIN37 (GPIO26) to avoid the I2S interface from v1.3 to v2.0.
'''X728 V1.3'''
[[File:X728-V1.3-Interface.jpg|800px|X728-V1.3-Interface]]
'''X728 V1.2'''
[[File:X728-IMG-7960-1.jpg|800px]]
[[File:X728-IMG-7979-1.jpg|800px]]
==Power Jack and Connectors==
{| class="wikitable collapsible collapsed"
# Don't power the Raspberry Pi via the Pi's type-C USB socket
# X728 can be powered via the onboard DC jack <span style="color:red;">or</span> Type-C USB power socket
==Pins and GPIO used==
<span style="color:red;">PIN33 (GPIO13) is replaced by the PIN37 (GPIO26) to avoid the I2S interface from v1.3 to v2.0.</span>
{| class="wikitable collapsible collapsed"! 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 <span style="color:red;">(For V1.3 and previous versions only)</span>|-| 31 || GPIO6 for AC power loss detection (PLD jumper inserted, High=Power loss,Low=Power supply normal)|-| 37 || GPIO26 for power management <span style="color:red;">(New add from V2.0)</span>|-| 38 || GPIO20 for buzzer control <span style="color:red;">(New add from V2.1 )</span>|-| 36 || GPIO16 for battery charging control <span style="color:red;">(New add from V2.5 )</span>|} {| class="wikitable"! Pin No. !! GPIO No. !! Remark !! Ver 1.2 !! Ver 1.3 !! Ver 2.0 !! Ver 2.1 !! Ver 2.2 !! Ver 2.3!! Ver 2.5|-| 2, 4 || || 5V || √ || √ || √ || √ || √ || √||√|-| 3, 5 || || I2C for RTC and battery fuel-gauge systems || √ || √ || √ || √ || √ || √||√|-| 6 || || Ground || √ || √ || √ || √ || √ || √||√|-| 29 || GPIO05 || Power management || √ || √ || √ || √ || √ || √||√|-| 31 || GPIO06 || for AC power loss detection<br>(PLD jumper inserted, <br>High=Power loss,Low=Power supply normal) || √ || √ || √ || √ || √ || √||√|-| 32 || GPIO12 || Power management || √ || √ || √ || √ || √ || √||√|-| 33 || GPIO13 || Power management || √ || √ || || || || |||-| 37 || GPIO26 || Power management<br>GPIO13 is replaced to GPIO26 from Ver 2.0 || || || √ || √ || √ || √||√|-| 38 || GPIO20 || for Buzzer control || || || || √ || √ || √||√|-| 36 || GPIO16 || for battery chargingcontrol || || || || || || ||√|} ==6-Pin Function Headerfor X728 V1.2==
{| class="wikitable collapsible collapsed"
! Jumper Name !! Usage
|| Short - Automatic shutdown enabled when battery low (≤3Vdc )
<span style="color:red;">(Battery must be >3V and installed before enabling this function)</span>
Open - Short - Automatic shutdown disabled 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.
|}
| 2 || Ground
|-
| 3 || LED+ for battery low indicatorGround
|-
| 4 || LED+ for power on, rebooting and shutdown
| ||
|-
| PWR || "LED blue indicates|-| Stays on - Power on|-| Blinks rapidly - system rebooting|-| Blinks slowly - Shutting down"
|}
==Fuel gauge - LED Indicator==
<span style="color:red;">Operation of Discharging:</span>
{| class="wikitable collapsible collapsed"
! Capacity C (%) !! D1 !! D2 !! D3 !! D4
|}
<span style="color:red;">Operation of charging:</span>
{| class="wikitable collapsible collapsed"
! Capacity C (%) !! D1 !! D2 !! D3 !! D4
| C＜25% || Flashing || OFF || OFF || OFF
|}
==Pins and GPIO usedPCB Layout=={| class="wikitable collapsible collapsed"<gallery>! Pin NoX728-PCB. !! Usage|-| 2, 4 || +5V power supply|-png| X728 V1.3, 5 || I2C for RTC and battery fuel-gauge systemsPCB LayoutX728_V2.0_PCB_Layout.jpg|-| 6 || Ground |-X728 V2.0 PCB Layout| 29 || GPIO5 for power management|X728-| 32 || GPIO12 for power management |V2.1-PCB.png| 33 || GPIO13 for power management|-X728 V2.1 PCB Layout| 31 || GPIO6 for AC power loss detection (Jumper for PLD inserted, High=power loss,Low=Power supply normal)</gallery>|}
==18650 battery dimension==
[[File:18650size.png]]
<span style="color:red;">Do not use 18650 battery with built-in protection circuit</span>
==Raspberry Pi Official GPIO Expansion describe==
[[File:RPI-GPIO-expansion.png | 800px]]
==Installation Guide==
Installation Video for X728+X728-A1+X728-A2: https://youtu.be/q_TmqMNhJPM
{{#ev:youtube|https://youtu.be/q_TmqMNhJPM}}
[[File:X728+X728A1+X728A2-Installation-Guide.jpg|800px|X728]]
Return to [[X728]]
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