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IIC and UART Expansion Shield BMB22T101

US$12.80

In stock

Quantity

18 pieces

Product ID

BMB22T101

The product is an expansion shield with two one-wire UART interfaces, four UART interfaces, two I²C interfaces, and one BMCOM. It is mainly designed to solve the issue of insufficient communication pins.

PRODUCT FEATURES

Operating voltage: 3.3V~5V
Interface:
- One-wire UART x 2
- BMCOM x 1
- I²C x 2
- UART x 4 (configurable baud rate: 230400bps Max.)
IC: WK2114
Parity format: parity bit / no parity bit
Stop bit: 1 bit or 2 bits
Receive/transmit FIFO: 256 bytes, the byte number can be queried
TX / RX pin status: enable / disable
Dimension: 67 x 53.34 x 16.8 mm
Net weight: 23.7g

DESCRIPTION

You can insert the product into an Arduino UNO or the BMduino-UNO, BM53A367A, without using an external cable.

The product offers UART, one-wire UART, I²C and BMCOM interfaces.

UART interface: expanding the main serial port to four sub-serial ports. You can configure the baud rate, check format, and stop bit for each UART sub-serial port.
One-wire UART interface: communicating by using the SoftwareSerial library of BMduino-UNO BM53A367A.
BMCOM: communicating via hardware I²C or software UART. It is necessary to use it with the above software, SoftwareSerial library.
I²C interface: simulating I²C master via IO pins.

HARDWARE OVERVIEW

Front Side

Rear Side

PIN DESCRIPTION

For a larger view

Pin	BM53A367A pin	Function
3	RESET	Reset the development board
4	3.3V	Positive power
5	5V	Positive power
6	GND	Ground
7	GND	Ground
9	D14/A0	I²C 1: data line
10	D15/A1	I²C 1: clock line
11	~D16/A2	I²C 2: data line
12	D17/A3	I²C 2: clock line
17	~D2	Reset UART port
18	~D3	BMCOM interrupt pin
19	~D4	UART: TX
20	~D5	UART: RX
21	~D6	One-wire UART 1: communication data line
22	D7	One-wire UART 1: communication data line
23	~D8	I²C 1 interrupt pin
24	~D9	I²C 2 interrupt pin
25	~D10	UART interrupt pin
26	~D11	One-wire UART 2: communication data line
27	~D12	One-wire UART 2: communication data line
29	GND	Ground
31	D18/A4	BMCOM: I²C data line / UART RX
32	D19/A5	BMCOM: I²C clock line / UART TX

Type	Pin name	Function
One-wire UART 1	TRX1	UART: communication data line
	GND	Ground
	TRX1	UART: communication data line
	VDD3	Positive power
One-wire UART 2	TRX2	UART: communication data line
	GND	Ground
	TRX2	UART: communication data line
	VDD3	Positive power
BMCOM	STA	Interrupt pin
	SCL/TX	I²C: clock line / UART: TX
	SDA/RX	I²C: data line / UART: RX
	VDD	Positive power
	GND	Ground
I²C 1	STA1	Interrupt pin
	SCL1	I²C: clock line
	SDA1	I²C: data line
	VDD1	Positive power
	GND	Ground
I²C 2	STA2	Interrupt pin
	SCL2	I²C: clock line
	SDA2	I²C: data line
	VDD2	Positive power
	GND	Ground
UART	mSTA	Interrupt pin
	mTXn	UART: TX
	mRXn	UART: RX
	mVDD	Positive power
	GND	Ground