WM321 Gimbal top board - randomlettersandnumbers/DJI-Stuff GitHub Wiki
Table of Contents
Function
Variants
Parts
Programming
External interfaces
Service interfaces
Board view
Schematics
Function
The top gimbal board is responsible for transmitting video for live FPV feed, which was previously prepared and compressed by Camera encoder board. It also controls the gimbal, and contains first of 3 gimbal motor drivers.
Variants
There are multiple versions of the board.
| Marking | Overview |
|---|---|
| P01117.T4 |
Parts
Version P01117.T4 components
| Marking | Amt. | Pkg. | Function | Specification |
|---|---|---|---|---|
| STM32F407 | 1 | |||
| DSPIC32 | 1 | |||
| Micron 5GM12 D9NLC D8VC | 1 | 60-ball FBGA | MT46V16M16CY-5B:M Automotive DDR SDRAM, 4 Meg x 16 x 4 banks | description |
| Atheros AR9312 8B1A | 1 | |||
| Winbond 25Q64FVSIG 1452 | 1 | 64MBit Serial NOR Flash Memory | description | |
| SiGe 2565T 510GR | 2 | |||
| SKY2 5405 | 2 | |||
| SKY 3348 | 2 | |||
| 2Fx | 2 | |||
| AEUF | 1 | 8-pin SOT-23 | MAX6370KA+ Pin-Selectable Watchdog Timer | datasheet |
| OFW | 2 | 10-lead 2x1.5 UQFN-4141 | TI TS3USB221A-Q1 480 Mbps 1:2 Multiplexer/Demultiplexer Switch | description |
| AEKF | 2 | 5-pin SOT-23 | MAX3051EKA+T IC TXRX CAN 1MBPS | |
| T120 MhNK | 2 | 4-lead SMD 3225 | Quartz oscillator, 12 MHz | |
| T400 UaB0 | 1 | 4-lead SMD 3225 | Quartz oscillator, 40 MHz | |
| 316BCG M48845 | 1 | 8-pin 5x4.4 SOIC | MLX90316 Triaxis rotary position sensor; reads position of the magnet encoder ring on yaw motor shaft | decription |
| CON 1-35 2-34 | 1 | SMD | Omron XF2B-3545-31A; Flat Film Cable Connector | datasheet |
Programming
| Chips | Firmware | Description |
|---|---|---|
| DSPIC33 | [gimbal arm Firmware](/randomlettersandnumbers/DJI-Stuff/wiki/Firmware-DSPIC33-gimbal-arm) | Gimbal yaw control; reads yaw arm position potentiometer and supplies control signal to the motor driver circuit. Pre-programmed and not included in firmware updates. |
| STM32F407 | [m0400](/randomlettersandnumbers/DJI-Stuff/wiki/Firmware-m0400) | Gimbal master control; provides gimbal arm microcontrollers with proper signals to ensure stabilization and responsiveness to user commands. |
| AR9342 | [m0700](/randomlettersandnumbers/DJI-Stuff/wiki/Firmware-m0700) |
External interfaces
Connectors on the board are:
| Marking | Overview |
|---|---|
| TODO |
Service interfaces
The following service pads exist on this board:
| Marking | Overview |
|---|---|
| TODO |
Board view
Top of a P01117.T4 board:
Bottom of the P01117.T4 board:
Top of another P01117.T4 board:
Bottom of the P01117.T4 board:
Bottom of an unknown P01117 board, with gimbal arm circuit changed:
Schematics
No schematics available.