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Circuit Tracks Reverse Engineering

Components

Chip Type Datasheet Location
STM32F745VEH6 ARM®-based Cortex®-M7 32b MCU+FPU, 462DMIPS, 512KB Flash / 320KB SRAM, USB OTG HS/FS, ethernet, 18 TIMs, 3 ADCs, 25 com itf, cam & LCD Link Top of board, right near USB and Battery
DSPB56724AG Symphony™ DSP56724/ DSP56725 Multi-Core Audio Processors Link Under RF Shield, top of board
MX25L25645G NOR Flash, 256M-BIT, 3V, [x 1/x 2/x 4] CMOS MXSMIO® (SERIAL MULTI I/O) FLASH MEMORY Link Bottom side of board, bottom left
IS42S16160G-7TLI-TR 32Meg x 8, 16Meg x16 256Mb SYNCHRONOUS DRAM Link Under RF Shield, top of board
LVT573 Low Voltage Octal Transparent Latch with 3-STATE Outputs Link Under RF Shield, top of board
MPSM36 MP2633 Switching Charger for Battery Link
74HC4051D Nexperia 8 channel analog multiplexer/demultiplexer Link
2746J32 JRC Single supply, rail to rail dual op-amp Link Bloody everywhere
AKM 4556VT 3V 192kHz 24Bit Stereo Delta Sigma Codec Link

LiPo battery

  • BAKTH LP-306987-1S-3, 3.7 V

  • 4 × 70 × 90 mm, 44 g

  • 2200 mAh, 8.14 Wh

  • 10kOhm Thermistor (yellow to black)

  • cut off voltage: 2.8 V

Debugging header

10-Pin Legged TC2050 Plug-of-Nails™ programming cable would be compatible.

Microcontroller pinout

Pin Function used in bootloader
UART MIDI 5 PIN
PA9 UART1_TX
PB7 UART1_RX
PD5 UART2_TX
SPI2
PC1 SPI2_MOSI
PC2 SPI2_MISO
PD3 SPI2_SCK
SPI4
PE14 SPI4_MOSI yes
PE13 SPI4_MISO yes
PE12 SPI4_SCK yes
SDMMC1 SDCARD
PD2 SDMMC1_CMD
PC8 SDMMC1_D0
PC9 SDMMC1_D1
PC10 SDMMC1_D2
PC11 SDMMC1_D3
PC12 SDMMC1_CK
QUADSPI NOR Flash
PB2 QUADSPI_CLK yes
PD11 QUADSPI_BK1_IO0 yes
PD12 QUADSPI_BK1_IO1 yes
PE2 QUADSPI_BK1_IO2 yes
PD13 QUADSPI_BK1_IO3 yes
PB6 QUADSPI_BK1_NCS yes
Clk Out
PA8 MCO1
USB HS
PB14 USB_OTG_HS_DM yes
PB15 USB_OTG_HS_DP yes
Outputs
PA12 Output
PB1 Output yes
PB4 Output
PB8 Output yes
PB9 Output yes
PB10 Output
PB11 Output
PB12 Output
PC0 Output yes
PC4 Output yes
PC6 Output
PC15 Output yes
PD0 Output
PD1 Output
PD6 Output yes
PD8 Output
PD9 Output
PE1 Output (speed 1) yes
PE3 Output
PE4 Output
PE7 Output (speed 1) yes
PE8 Output (speed 1) yes
PE9 Output (speed 1) yes
PE10 Output (Speed 2) yes
PE11 Output yes
PE15 Output yes
Inputs
PA10 Input
PA11 Input yes
PA15 Input
PC5 Input (Pull-Up) yes
PC7 Input yes
PD4 Input
PD7 Input
PD10 Input yes
PD14 Input yes
PD15 Input yes
PE0 Input yes
**Anlg.I **
PA0 Analog0
PA1 Analog1
PA2 Analog2
PA3 Analog3
PA4 Analog4
PA5 Analog5
PA6 Analog6

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