Caddx Walksnail Avatar HD fpv goggles are also sold as Fat Shark Dominator HD FSV1125
About The System
These Goggles have been made in partnership with Fat Shark and are sold under both the Fat Shark and Walksnail brand.
They are both compatible with the Walksnail Avatar HD VTX and offer identical functionally.
Internal Images
Images provided by my self and M Bundy.
Important SOC Images Notes
The main chipset used in Avatar HD is Artosyn AR9201/AR8211. This is a similar chipset to the DJI P1 being an CPU and RF base band all in one with Arm cores and Ceva LTE ISP. This chip is not the same as DJI’s though and is believes to be developed separately from the DJI P1 and S1. Both Chipset share a lineage to chipsets from Leadcore such as the LC1860C as used by DJI and others in the past all based of china inhouse designed SOC for use smartphone and tablets based on LTE Ceva ISP’s.
It is also worth noting that DJI has worked with Artosyn in the past on their RF systems and we have suspicions after the fall of Leadcore DJI may have worked with Artosyn to help develop their own SOC. DJI has worked with Artosyn in the early days of Lightbridge and Ocusync development and may have even contributed to the P1 and S1. While there is some possible heritage between the chipsets they are not compatible with each others systems in any way.
Both Chipset share a lineage to chipsets from Leadcore such as the LC1860C
In early samples the main SOC is labelled as a Xilinx Virtex 5 XC5VLX50T – FFG1136FGU2033 – AC4284883A1 2C however this is a obviation attempt.
Based on code samples and SOC package it a Artosyn RF Chipset, the AR9201/AR8211.
AR902 Specification
AR9201 Application Processor Core
1.5GHz ARM Cortex-A7 quad-core, each core with 32KB I-cache, 32KB D-cache
512KB L2 cache
Neon acceleration and double precision FPU
Embedded Trace data interface (16KB ETB) for ARM-DS5 debugger
DVFS control: Dynamic voltage and frequency scaling to reduce power consumption
MCU core
500MHz CPU, 16Kbyte I-cache, 16KB D-cache
128KB ITCM and 64KB DTCM
Double precision FPU
CEVA DSP core
4 x high performance CEVA XM4 Cores at 1000MHz
2M-Byte shared on-chip SRAM
Video Codec Format
H.264 BP/MP/HP encoding and decoding
H.265 MAIN/MAIN10 @L5.0 High-tier encoding and decoding
MJPEG/JPEG Extended Sequential encoding and decoding
Video Codec Performance
Software configurable video codec, either as encoder or as decoder
Real-time multi-stream H.264/H.265 encoding or decoding:
H.264: [/cdn-cgi/l/email-protection [email protected]]
[/cdn-cgi/l/email-protection [email protected]][/cdn-cgi/l/email-protection [email protected]]
MJPEG/JPEG encoding/decoding at [/cdn-cgi/l/email-protection [email protected]]
MJPEG/JPEG encoding and decoding
Baseband
2T4R with 2.5MHz/5MHz/10MHz/20MHz/40MHz bandwidth
BPSK/QPSK/16QAM/64QAM/256QAM modulation
LDPC encoder with 1/2, 2/3, 3/4 code rate
Max down link rate at 100Mbps
2.4G/5.8G uplink/downlink communication
One AP support max to four nodes
Analog
One 8-1 10bit SAR ADC
Two 10bit SAR ADCs
Four 12bit DACs
Eight 12bit ADCs
Peripherals
9 UARTs
2 Watch dog timers
20 timers,10 of which have PWM output
4 CAN bus interface
5 I2C interfaces, can be configured as either master or slave by software
4 SPI masters(2×1-1, 2×1-5 ), 2 SPI slave
4 I2S 4bit interfaces
147 GPIO, shared with other functions.
2 AXI DMA controller
One AHB DMA controller
USB 3.0 DRD controller and PHY.
USB 3.0 /Type-C / DisplayPort combo interface
10 /100/1000M Ethernet RGMII interface
2-lane PCIe 2.0, can be configured as EP or RC mode
External Memory Interfaces
DDR4/DDR3/LPDDR3 interface
16/32/64-bit DDR4 interface up to DDR4 2400
16/32/64-bit DDR3L interface up to DDR3L 2133
32/64-bit LPDDR3 interface up to LPDDR3 2133
SPI NOR flash interface
1-/2-/4-wire mode
3-byte or 4-byte address mode
Maximum capacity of 256 MB NOR flash or MCP SPI NOR+NAND flash
eMMC 5.1 interface with 64GB max capacity
Secure Boot from internal ROM with eMMC flash or SPI NOR flash.
Physical Specification
Power consumption
3W typical power consumption in the 4Kx2K scenario
Multiple power domains for power saving
[11:19]
Operating voltages
0.9V core voltage
1.8VI/O voltage
1.2V/1.2V/1.5V for DDR4/LPDDR3/DDR3(L)
3.3VI/O voltage
Package
FCBGA
Body size of 19mm x19mm
Ball pitch of 0.65mm
#Avatar HD Goggles #Caddx FPV #Dominator HD