WM232 Main Core Processor board
Function
Variants
Parts
Programming
External interfaces
Service interfaces
Board view
Schematics
The board stores most of computational power of the drone. It contains video encoder for both FPV and SD-card, but also video recognition for positioning (VPS) and gesture control. It also contains transceiver and high-frequency components.
Several versions of the module are known.
| Marking | Overview |
|---|---|
| PP002283.01 |
| Marking | Amt. | Pkg. | Function | Specification |
|---|---|---|---|---|
| P1 02 V10R01 2053 IBGS89.00 | 1 | "Sparrow", Cortex-M, SDR | ||
| H6 V100 2044 PV7K87.00S-1 | 1 | FBGA | Custom ASIC based on Imagination Technologies IP, Cortex-A7 CPU, PowerVR e5500 encoder, TrustZone | |
| SEC 043 B041 KLMAG1JETD NNAHRRGVS | 1 | 153FBGA 11.5x13 | Samsung KLMAG1JETD-B041 eMMC 128Gbit, eMMC5.1 JEDEC Standard support | description datasheet |
| OPT 3101 TI 086 A212 | 1 | QFN | Texas Instruments OPT3101 ToF-based long-range proximity and distance sensor analog front end | description |
| 213 GAZ | 2 | |||
| 513 GAK | 2 | Not sure if separate chips, or just barely readable 213 GAZ | ||
| 566235 ?081 ? 20 | 2 | barely readable | ||
| BN52.0 D045 | 1 | Quartz Oscillator | ||
| R0.03 D041 | 1 | Quartz Oscillator | ||
| XP38K D041 | 1 | Quartz Oscillator; barely readable | ||
| W1A 06 | 1 | 3-pin SOT-23 | PMBT3904 NPN switching transistor | description |
| 1A w0d | 2 | 6-pin DFN-33 | ||
| 4200 | 1 | 6-pin SOT | ||
| R100 | 1 | SMD Resistor | ||
| IE1000 N40G66.00 2044 | 2 | 5.8GHz RF Amp (both PA and LNA) | ||
| Micron 0XB77 D9WRB IRTI | 2 | Micron MT53E256M32D2DS-053 WT:B 8Gb LPDDR4-3733 | description | |
| ACTIVE 8846QM J02CHL | 1 | Active-Semi Advanced PMIC for Multi-Core Application Processors | description |
| Chips | Firmware | Description |
|---|---|---|
| H6 E1E | m0801 |
| Marking | Overview |
|---|---|
| TODO |
The following service pads exist on this board:
| Marking | Overview |
|---|---|
| TODO |
Top of a PP002283.01 board:
Bottom of the PP002283.01 board:
flowchart LR
Connector-BAT((batt<br/>connec<br/>tor))
subgraph Battery Intelligent board
direction LR
BatteryBMS[BQ9003 BMS<br/>Li-Ion pack<br/>manager]
BattFeedbackR(0.01 Ohm<br/>feedback<br/>resistor)
EnablePackFET(MOSFET<br/>output<br/>control)
EnableChargeFET(MOSFET<br/>charge<br/>enable)
EnableDischargeFET(MOSFET<br/>internal<br/>discharge<br/>enable)
DischargeR(discharge<br/>resistor)
BatteryButton(button)
BatteryLEDs(LED line)
DischargeR---EnableDischargeFET
BatteryBMS-- DSG ---EnableDischargeFET
BatteryBMS-- PCHG ---EnablePackFET
BatteryBMS-- CHG ---EnableChargeFET
BatteryButton---BatteryBMS
BatteryLEDs---BatteryBMS
end
subgraph Li-Po cells pack
direction TB
BatteryCell1(battery<br/>cell 1)
BatteryCell2(battery<br/>cell 2)
BatteryCell3(battery<br/>cell 3)
BatteryTempSense(NTC<br/>thermistor)
BatteryCell1===BatteryCell2
BatteryCell3===BatteryCell2
end
BattFeedbackR===BatteryCell1
BatteryBMS-- VSS ---BatteryCell1
BatteryBMS---BatteryCell2
BatteryBMS---BatteryCell3
Connector-BAT== PACK- ===BattFeedbackR
BatteryBMS-- SRn ---BattFeedbackR
BatteryBMS-- TS ---BatteryTempSense
EnableDischargeFET===BatteryCell3
EnablePackFET===EnableDischargeFET
EnableChargeFET===EnableDischargeFET
Connector-BAT== PACK+ ====EnablePackFET
Connector-BAT== PACK+ ====EnableChargeFET
Connector-BAT-- SMBus ----BatteryBMS
Thick lines are the ones transferring high power. Feedback resistor for measuring current is inserted into negative line, while all the MOSFET switches are within positive line. The three Li-Po cells are connected in series, so that the voltage sums up.
The output connector includes SMBus lines from the Battery Management System chip, which allow to exchange packets described in Smart Battery Specification, as well as some DJI-specific extensions.
The charge level, as well as errors and faults detected within the BMS, can be shown on four LEDs. Specifics of how the interface and the buttons work, as well as extensions to the SBS protocol, require implementation within the BMS firmware. Therefore, the firmware is not a stock TI version, but a modification of TIs firmware code by DJI engineers.
No schematics available.