Etherbridge_custom

This repository contains the code for the custom Etherbride-board. This board is base on a STM32H533CET6 MCU in a 48-pin LQFP package.

Attached to it is a W5500 ethernet chip from Wiznet and a 93LC86 EEPROM. The external clock is provided by a 25MHz crystal oscillator. The W5500 gets its 25 MHz clock via the MCO1-pin from the MCU.

External interfaces are CAN, RS485, an UART as extra serial interface and the SWD port for programming and debugging. Also, a LED is connected to IO-pin PH1.

Schematic

You can find the full schematic here.

Pinout

MCU Pin	Signal Name	Function	Mode
PH0	MAIN_CLK	HSE_IN
PA1	RS485_DE	USART2_DE	AF7
PA2	RS485_TX	USART2_TX	AF7
PA3	RS485_RX	USART2_RX	AF7
PA4	WZ_RST_N	W5500 Reset Active Low	Output
PB12	WZ_INT_N	W5500 Int In Active Low	Input
PB10	WZ_CS_N	W5500 Chip Select Active Low	Output
PA5	WZ_SCK	SPI1_CLK	AF5
PA6	WZ_MISO	SPI1_MISO	AF5
PA7	WZ_MOSI	SPI1_MOSI	AF5
PA8	WZ_CLK	MCO1 W5500 Main Clock (25MHz)	AF0
PB15	EEP_CS	93LC86 Chip Select	Output
PB1	EEP_SCK	SPI3_SCK	AF4
PB0	EEP_MISO	SPI3_MISO	AF5
PB2	EEP_MOSI	SPI3_MOSI	AF7
PB13	EEP_ORG	MemOrg: low: x8; high: x16	Output
PB14	EEP_PE	Program Enable	Output
PA9	SER_TX	USART1_TX	AF7
PA10	SER_RX	USART1_RX	AF7
PA11	CAN_RX	FDCAN1_RX	AF9
PA12	CAN_TX	FDCAN1_TX	AF9
PA13	SWDIO	Serial Wire Debug I/O	AF0
PA14	SWCLK	Serial Wire Debug CLK	AF0
PB3	SWO	Serial Wire Debug Data Out	AF0
PH1	LED	Spare Pin with LED	Output
PA0	IO_PA0	Spare Pin	Analog In
PA15	IO_PA15	Spare Pin	Analog In
PB4	IO_PB4	Spare Pin	Analog In
PB5	IO_PB5	Spare Pin	Analog In
PB6	IO_PB6	Spare Pin	Analog In
PB7	IO_PB7	Spare Pin	Analog In
PB8	IO_PB8	Spare Pin	Analog In
PC13	IO_PC13	Spare Pin	Analog In
PC14	IO_PC14	Spare Pin	Analog In
PC15	IO_PC15	Spare Pin	Analog In