This module is designed to plug into the System Bus connectors (J34 & J35) of the SBC-SAM9G45 development board, giving you four additional serial ports onto which you can connect TTL-RS232 modules or whatever other 3.3V serial device you care to wire up to it.

Converts System Bus to 4x TTL serial ports

Supports 5-wire serial ports

Size: 61 × 34 mm

Board Support: SBC-SAM9G45

Input interface

Two 2×10-pin female headers, 2.54mm pitch.

 Connector: J3(2 x 10 Pin 2.54mm header)

Pin	Signal	Description	Pin	Signal	Description
1	GND	GND	2	A0	Address Bus
3	A1	Address Bus	4	AA2	Address Bus
5	A3	Address Bus	6	NC	-
7	A5	Address Bus	8	NC	-
9	INTA	Interrupt A	10	GND	GND
11	INTB	Interrupt B	12	INTC	Interrupt C
13	INTD	Interrupt D	14	NRST	Reset
15	NRD	Processor Read Command	16	NV
17	NWE	Processor Write Command	18	NCS_EXT	Chip select
19	GND	GND	20	NC

Connector: J2(2 x 10 Pin 2.54mm header)

Pin	Signal	Description	Pin	Signal	Description
1	VDD33	Power 3.3V	2	VDD33	Power 3.3V
3	D0	Data Bus	4	D1	Data Bus
5	D2	Data Bus	6	D3	Data Bus
7	D4	Data Bus	8	D5	Data Bus
9	D6	Data Bus	10	D7	Data Bus
11	D8	Data Bus	12	D9	Data Bus
13	D10	Data Bus	14	D11	Data Bus
15	D12	Data Bus	16	D13	Data Bus
17	D14	Data Bus	18	D15	Data Bus
19	GND	GND	20	GND	GND

Output interface

Four 2×5-pin headers, 2.54mm (0.1") pitch.

Pin	J3	J4	J5	J6	Description
1	NC	NC	NC	NC	NC
3	RXD6	RXD5	RXD3	RXD4	UART serial data in
5	TXD6	TXD5	TXD3	TXD4	UART serial data out
7	NC	NC	NC	NC	NC
9	GND	GND	GND	GND	GND
11	NC	NC	NC	NC	NC
13	RTS6	RTS5	RTS3	RTS4	UART request to send
15	CTS6	CTS5	CTS3	CTS4	UART clear to send
17	NC	NC	NC	NC	NC
19	VDD33	VDD33	VDD33	VDD33	VDD 3.3V

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No	Title	Price	Order Now
1	BUS-Serial	$30USD