19 iulie 2021

Xiegu G90 MCU and DB9 reference

## Board revision: V2.0.7 GAI03 
## LCD Display: KD018QQTBN009-RT 
 Link to manufacturer: http://en.tft-tft.com/product/detail?id=19 

### uC pinouts and signals

 

FRONT PANEL UNIT
STM32F103RCT6 - LQFP64



Pin no Pin name Description
51 PC10 USART_3_Rx 3.5mm PC_RING
52 PC11 USART_3_Tx 3.5mm PC_TIP
42 PA9 USART_1_Tx to MAIN DB9_2
43 PA10 USART_1_Rx from MAIN DB9_3



MAIN UNIT
STM32F429ZGT6 - LQFP144



Pin no Pin name Description
96 PC6 USART_6_Tx to Front Panel DB9_3
97 PC7 USART_6_Rx from Front Panel DB9_2





DB9 connector between MAIN UNIT and FRONT PANEL

Pin Description
1 9V after POWER ON from PWR Board LM2940-9.0 LDO
2 USART From PANEL to MAIN UNIT
3 USART From MAIN UNIT to PANEL
4 Vcc (13.8V) on stand by /POWER COMMAND/ 3V3 on POWER ON
5 GND

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